I. Mechanical energy is defined as the sum of which of the following? a. kinetic, potential, and...
Question:
I. Mechanical energy is defined as the sum of which of the following?
a. kinetic, potential, and radiant energy.
b. kinetic, potential, and nuclear energy.
c. all forms of kinetic energy.
d. kinetic and all forms of potential energy.
II. An object that revolves about a single axis at constant speed has_____.
a. centripetal acceleration.
b. tangential speed.
c. uniform circular motion.
d. all of the above.
Mechanical Energy, Circular Motion:
The word 'mechanical' is related to machines. Mechanical energy is related to the energy exchanged by the action of forces. The mechanical energy of a system is changed when a net external force performs work on the system.
The motion along a circle is called circular motion. The motion along circle can occur at a constant speed or at a varying speed. In either case, the object is continuously accelerated so that its velocity changes in such a way that remains on the circular path.
Answer and Explanation: 1
Become a Study.com member to unlock this answer! Create your account
View this answer
I)
Mechanical energy is defined as the sum of the kinetic energy and potential energy. The kinetic energy is the energy due to motion while...
See full answer below.
Ask a question
Our experts can answer your tough homework and study questions.
Ask a question Ask a questionSearch Answers
Learn more about this topic:
Get access to this video and our entire Q&A library
Uniform Circular Motion: Definition & Mathematics
from
Chapter 3 / Lesson 23
32K
Define uniform circular motion. Define centripetal force and centrifugal force and identify the formula for uniform circular motion.
Related to this Question
- Potential energy and kinetic energy are forms of what kind of energy? a. mechanical b. nuclear c. heat d. electromagnetic e. chemical
- Potential energy and kinetic energy are forms of what kind of energy? 1. Chemical 2. Electromagnetic 3. Mechanical 4. Heat 5. Nuclear
- What is the kinetic energy of a particle of mass (m) that has a total energy four times its rest energy? a) 5 mc^2 b) 4 mc^2 c) 3 mc^2 d) 2 mc^2 e) 1 mc^2
- The sum of the kinetic and potential energy of all the atoms and molecules in a substance is known as its what?
- The motion of a particle is given by x(t)=(25cm)cos(14t) , where t is in s. What is the first time the kinetic energy is twice the potential energy?
- If the kinetic and potential energies of a particle are given by T = 1 / 2 m (9 x dot ^2 + 6 x dot y dot + 5 dot y^2) U = -m g x - 3 m g y Use any method you like to find double dot x.
- If the kinetic and potential energies of a particle are given by T = 1/2 m (9 x dot^{2} + 6 x dot y dot +5 y dot^{2} ) U = -m g x - 3 m g y. Find x double dot.
- The gravitational potential energy of a two-particle system are derived as U= \fracGm_1m_2}{r}. Does it follow from this equation that the potential energy for r = \infty must be zero? Can we choose the potential energy for r = \infty to be 20 \ J and sti
- If the kinetic energy of a particle is 3.00 times its rest energy, the speed of the particle is closest to which of the following values? a: 0.990 c b: 0.984 c c: 0.968 c d: 0.976 c e: 0.950 c
- Answer the following question. State differences between kinetic energy and potential energy.
- Write an expression relating the kinetic energy KE of the electron and the potential energy PE in the Bohr model of the hydrogen atom. a) Suppose a hydrogen atom absorbs a photon of energy E, resulting in the transfer of the electron to a higher - energy
- Is light potential or kinetic energy?
- What do we mean by mass-energy? Is it a form of kinetic, radiative, or potential energy? How is the idea of mass -energy related to E = m c^2 ? Explain how E = m c^2 is at work in our Sun to produce the light and the heat emitted by the star?
- An alpha particle (charge +2e) moves through a potential difference delta V = -0.270 KV. Its initial kinetic energy is 3.60 x 10^-16 J. What is its final kinetic energy?
- The kinetic energy of a particle depends on the reference frame of the observer. In an exoergic reaction, the total final kinetic energy is greater than the total initial kinetic energy. Which of the following is correct? a. A reaction that is exoergic
- An alpha particle of (q = +2e') in a nuclear accelerator moves from one terminal at potential of + 6.5 times 10^5 V to another potential V_b = 0. (a) What is the corresponding change of potential energy of the system? (b) What is the change in kinetic ene
- 1. What is the kinetic energy of 1.1 g particle with a speed of 0.50 c? 2. What is the rest energy of 1.1 g particle with a speed of 0.50 c? 3. What is the total energy of 1.1 g particle with a speed
- The kinetic energy of a particle is equal to its rest energy. What is the speed of the particle? (Give answer in terms of c.)
- An alpha particle (charge = +2e) is accelerated from rest across a potential difference of 7 MV in a particle accelerator. (a) What kinetic energy does it acquire (give your answer in joule and eV)? (b) What is the speed of the alpha particle?
- (a) What is the kinetic energy of a 1.2 g particle with a speed of 0.60 c? (b) What is the rest energy of a 1.2 g particle with a speed of 0.60 c? (c) What is the total energy of a 1.2 g particle with
- The motion of a 200 g particle is described by x(t) = 5.0 cm cos (50 pi t + (pi/3)) with x in cm and t in seconds. Calculate the velocity of the particle at the time when the potential energy is twice the kinetic energy.
- A neutron moves with a speed of 0.95 c. A) What is its total energy? B) What is its rest energy? C) What is its kinetic energy?
- A particle has a kinetic energy equal two and a half times its rest mass energy. What is the speed of this particle in terms of c?
- Energy released in a nuclear fission process is produced by: a. electrons moving from a higher energy orbit to a lower energy orbit b. the conversion of some charge to energy c. the conversion of gravitational potential energy into kinetic energy d. conve
- The motion of a 200 gram particle is described by x(t) = 5.0 cm \cos(50pt + p/3), with x in cm, and t in seconds. a) Determine the time when the potential energy is twice the kinetic energy. b) Calculate the position of the particle at this time. c) Calcu
- Consider a panicle with mass of I0 mg in an infinite potential well 1.0 cm wide. (a) If the energy of the particle is 10 mJ, calculate the value of n for that state. (b) What is the kinetic energy of
- What speed must a particle attain before its kinetic energy is double the value predicted by the nonrelativistic expression KE=1/2mv^2?
- An electron has been accelerated from rest through a potential difference of 1,000 V. a) What is its kinetic energy, in electron volts? b) What is its kinetic energy, in joules? c) What is its s
- The temperature at which average translational K.E. of a molecule is equal to the K.E. of an electron accelerated from rest through a potential difference of 1 V, is: (a) T = 7729 K (b) T = 8879 K (c)
- Through what potential difference does an electron have to be accelerated, starting from rest, to achieve a speed of 0.935 c? What is the kinetic energy of the electron at this speed? Express your answer in joules. What is the kinetic energy of the elec
- The wavefunction is psi(x)=Axe^(-ax^2) for with energy E=3ak^2/2m. Find the bounding potential V(x). Looking at the potential's form, can you write down the two energy levels that are immediately above E?
- If the potential energy of an electron in a hydrogen atom in the first excited state is taken to be zero, then find the kinetic energy (in eV) of an electron in the ground state.
- Consider a particle moving in the one-dimensional potential well given by: V (x) = g |x| Within the WKB approximation, determine the energy of the first 5 energy levels.
- The motion of a particle is given by x(t) = (25 cm) cos(15t), where t is in s. What is the first time at which the kinetic energy is twice the potential energy?
- Power applied to a particle varies with times as P = (3t^2 - 2t + 1)\ W, where t is in seconds. Calculate the change in its kinetic energy between times t = 2\ s and t = 4\ s.
- At what speed is a particles kinetic energy K equal to its rest mass energy mc^2? Remember that the kinetic energy is K = E - mc^2.
- An electron has been accelerated from rest through a potential difference of 1200 V. a) What is its kinetic energy, in electron volts? b) What is its kinetic energy, in joules? c) What is its speed
- An electron has been accelerated from rest through a potential difference of 900 V. a. What is its kinetic energy, in electron volts? b. What is its kinetic energy, in joules? c. What is its speed?
- How much kinetic energy will an electron gain (in joules) if it accelerates through a potential difference of 1.89 times 10^4 V ?
- Calculate Q value and threshold energy for ^20Ne( , ^12C)^12C reaction. What will be the kinetic energies of the ^12C nuclides if the alpha particle initially has 25 MeV of kinetic energy in the lab?
- The kinetic energy of a particle is 3 times its rest energy. What is the speed of the particle?
- A particle of mass m is bound in a potential V(x)=1/2*kx^2. Use the uncertainty pricniple to estimate the potential energy of the particle in the ground state. a. 1/2*h\omega b.1/2*h\sqrt{k/m} c. 1/4*
- A particle has a kinetic energy equal half its rest mass energy. What is the speed of this particle?
- What is the speed of a particle whose kinetic energy is equal to its rest energy?
- What is the speed of a particle whose kinetic energy is equal to twice its own rest energy?
- A particle has a kinetic energy equal quarter its rest mass energy. What is the speed of this particle?
- At what speed does the kinetic energy of a particle equals its rest energy?
- Suppose you had 10 identical molecules enclosed by a box. At a given instant, one molecule has an energy of 100 Joules, and the others are all stationary. (A) What is the average kinetic energy of the
- A particle of mass m in a simple harmonic oscillator is described by the potential energy m omega^2 x^2/2. The allowed energy eigenvalues for this particle happen to be E_n = (n + 1/2) hbar omega with n = 0,1,2, cdots The ground state wavefunction is give
- A neutron having kinetic energy 12.5 eV collides with a hydrogen atom at rest. Neglect the difference in mass between the neutron and the hydrogen atom and assume that the neutron does not leave its line of motion. Find the possible kinetic energies of th
- Points A and B have electric potentials of 279 V and 129 V, respectively. When an electron released from rest at point A arrives at point C its kinetic energy is KEA. When the electron is released from rest at point B, however, its kinetic energy when it
- A) How much kinetic energy is gained by an electron that is accelerated from rest through a potential difference of 23,000 V? Express your answer in eV and in J. B) What is the final speed of the electron from part A)?
- The binding of the potential energy (N2 for example) is often approximated by the Morse potential energy. It has the form U(r) = De (1-e^[-a(r-re)])2 where De is a constant that reflects the well dept
- In the nuclear fission reaction Uranium gives Thorium and Helium. 6.88 \times 10^{-13}\ J energy is released as the kinetic energies of the products. If the ratios of the masses Thorium to Helium is 234:4, find the kinetic energy of the \alpha particle.
- The kinetic energy of a particle is equal to the energy of a photon. The particle moves at 4.3% of the speed of light.
- A mysterious energy that accelerates the expansion of the Universe is A) dark energy. B) kinetic energy. C) thermal energy. D) gravitational potential energy. E) electric potential energy.
- A particle with 7 eV of kinetic energy moves from a region of zero potential into region of constant potential of U = 5.25 eV. In classical approach one would expect the particle to continue on with less kinetic energy. In quantum mechanics the particle h
- Points A and B have electric potentials of 277 V and 129 V, respectively. When an electron released from rest at point A arrives at point C, its kinetic energy is KEA. When the electron is released from rest at point B, however, its kinetic energy when it
- An electron has been accelerated from rest through a potential difference of 800 V. What is the electron's kinetic energy, in electron volts? What is the electron's kinetic energy, in joules? What is
- Briefly state the kinetic molecular theory as it applies to the following a) motion of particles b) size of particles c) interaction between particles d) kinetic energy of particles
- Starting from rest, a proton falls through a potential difference of 1200 V. a) What is its change in potential energy? b) How much kinetic energy did it gain? c) What is its final speed? (m_p = 1.66 times 10^{-27} kg)
- An electron has been accelerated from rest through a potential difference of 800 V. a. What is the electron's kinetic energy, in electron volts? b. What is the electron's kinetic energy, in joules? c.
- The physics of an electron falling through a potential difference. How much kinetic energy will an electron gain (joules) if it falls through a potential difference of 350 V?
- Light described at a place by the equation E = 100 ( s i n ( 5 10 1 5 ) t + s i n ( 8 10 15 ) t ) falls on the metal surface having work function 2eV. Calculate the maximum kinetic energy of pho
- How fast is a particle moving if its kinetic energy is equal to its rest energy?
- An electron, initially at rest, gains a speed of 10^7 m/s after being accelerated through a potential difference of V volt. a. Determine V. b. What is the final kinetic energy of the electron in J and eV?
- A particle is trapped in a square, 2-dimensional box. The lowest energy possible for the particle is 1.0 eV. What are the energies of the 5 lowest energy levels? Specify what the degeneracy of each of these levels is.
- Calculate the change in electric potential energy of an electron that moved from a potential of +1500 V to +1000 V. Explicitly state if the change in electric potential energy is positive or negative.
- An electron travels at a speed of 0.350c. What is the kinetic Energy? What is the total Energy?
- In the ground state of the H-atom, the electron has a total energy of -13.6\ \mathrm{eV}. What are (a) its kinetic energy, and (b) its potential energy if the electron is one Bohr radius from the central nucleus?
- The potential energy of a particle of mass m as a function of the position is given by U (x) = U_0(alpha + 1/alpha), where alpha = x / a and a is a constant. (a) Find the value of x = x_0 at stable equilibrium. (b) Write the potential energy U (x) for x
- For a classical harmonic oscillator, the particle can not go beyond thepoints where the total energy equals the potential energy. Identify thesepoints for a quantum-mechanical harmonic oscillator in its ground state.Write an integral giving the probabili
- A particle moves at a speed such that its kinetic energy just equals its mass energy. What is the speed of the particle?
- What is the kinetic energy of a 0.90 g particle with a speed of 0.70 c ?
- What is the kinetic energy of a 1.30 g particle with a speed of 0.800 c?
- What is the kinetic energy of a 1.6 g particle with a speed of 0.70 c ?
- How does the kinetic energy of the particle relate to its rest mass energy at relativistic speed?
- The ground state energy of a hydrogen atom is -13.6 eV. This energy is negative because: a. The electron is trapped in the atom, with not enough kinetic energy to escape. b. The zero-point of potential energy is infinitely far away, and anywhere closer ha
- Determine the ratio of the relativistic kinetic energy to the non-relativistic kinetic energy (\frac{1}{2}mv^2) for each of the following cases. a. A particle with a speed of 1.25 \times 10^{-3} m/s b. A particle with a speed of 0.990 c
- State the work-kinetic energy theorem for a particle.
- How much kinetic energy will an electron gain (in joules) if it accelerates through a potential difference of 1.32 \times 10^4 V?
- The Yukawa Potential energy function for the interaction of neutrons and protons in a nucleus is U(r) = -(a/r)Uoe^(-r/a). What is the force associated with this potential energy?
- Points A and B have electric potentials of 249 V and 129 V, respectively. When an electron released from rest at point A arrives at point C its kinetic energy is K_A. When the electron is released from rest at point B, however, its kinetic energy when it
- An electron has been accelerated from rest through a potential difference of 900 V. \\ A. What is the electron's kinetic energy, in electron volts? B. What is the electron's kinetic energy, in joules? C. What is the electron's speed?
- An electron has been accelerated from rest through a potential difference of 600 V. a. What is the electron's kinetic energy, in electron volts? b. What is the electron's kinetic energy, in joules? c. What is the electron's speed?
- The kinetic energy of a particle is equal to the energy of a photon. The particle moves at 5.2% of the speed of light. Find the ratio of the photon wavelength to the de Broglie wavelength of the particle. Take the speed to be non-relativistic.
- The kinetic energy of a particle is equal to the energy of a photon. The particle moves at 4.4% of the speed of light. Find the ratio of the photon wavelength to the de Broglie wavelength of the particle. Take the speed to be non-relativistic.
- How much kinetic energy will an electron gain in J and eV if it accelerates through a potential difference of 23,000 volts?
- A proton is accelerated from rest through a potential difference of 500 \ MV . (a) Find the proton's kinetic energy. (b) Find the proton's rest energy. (c) What's the ratio of kinetic to rest energy
- A nonrelativistic particle of mass m and charge q is accelerated from rest through a potential difference Delta V. (a) Use conservation of energy to find a symbolic expression for the momentum of the particle in terms of m, q, and DV. (b) Write a symbolic
- Assuming that a particular energy E is within a barrier with height U greater than E, will the particle have negative kinetic energy? Explain why or why not.
- Find the uncertainty in kinetic energy. Kinetic energy depends on mass and velocity according to this function E(m,v) = 1/2 m v^2. Your measured mass and velocity have the following uncertainties \Del
- A thermal neutron has a kinetic energy (3/2)kT where T is room temperature, 300 K. Such neutrons are in thermal equilibrium with normal surroundings. (a) What is the energy in electron volts of a thermal neutron? (b) What is its de Broglie wavelength?
- A constant power P is applied on a particle of mass m. Find kinetic energy, velocity and displacement of particle as function of time t.
Explore our homework questions and answers library
Browse
by subject