U = 0.5*k*x^2
here k is always positive. even if x is negative x^2 is
postive.
so, U is always postive.
KE = 0.5*m*v^2
here m is always positive. even if v is negative v^2 is
postive.
so, KE is always postive.
4. Explain why the kinetic and potential energies of an object-spring system can never be negative.
(a) Can the kinetic energy of an object be negative? If no, explain, if yes, give an example. (b) Can the potential energy of an object be negative? If no, explain, if yes, give an example.
The sum of the kinetic and potential energies of a system of objects is conserved: only when no external force acts on the objects only when the objects move along closed paths O only when the work done by the resultant external force is zero O always none of the above
mum Problem 1 (15 points) In an oscillating spring-mass system, the energy of the system is continually changing from kinetic energy to potential energy and back again. (Ignore the friction force). (5 points) Discuss in detail the energy conservation principle of the spring-mass system using your own words including the possible changes of both kinetic and potential energies during this motion? (5 points) At what point in the oscillation will the potential energy of the spring-mass system be highest? Why?...
The potential energy of an object attached to a spring is 2.50 J at a location where the kinetic energy is 1.30 J . If the amplitude A of the simple harmonic motion is 22.0 cm , calculate the spring constant k and the magnitude of the largest force F spring, max that the object experiences.
4: Explain why the potential energy between a positive charge and a negative charge is
The energy of motion is called: Kinetic energy. potential energy, inertial energy. Power. In an inelastic collision: momentum is conserved. kinetic energy is conserved, both (a) and (b). If the velocity of a moving object is doubled and its mass is cut in half, the kinetic energy of the object is; remains the same, doubled quadrupled, cut in half. When the net work done on an object is speed of the object is me on an object is zero; the...
A 3.5 kg object is attached to a horizontal spring of force constant k= 1500 N/m. The spring is stretched 15cm equilibrium and released. Find A. the frequency and the period of the motion, and B. The maximum speed. C. When does the object first reach its equilibrium position? D. What are the potential and kinetic energies when the displacement is one quarter of the amplitude?
A small rigid object carries positive and negative 3.00 nC charges. It is oriented so that the positive charge has coordinates (-1.20 mm, 1.30 mm) and the negative charge is at the point (1.60 mm, -1.30 mm) (a) Find the electric dipole moment of the object. The object is placed in an electric field E-(7800-4900 j) NC. Cmi+ C-m j (b) Find the torque acting on the object. (c) Find the potential energy of the object field system when the...
Using the five-component model, explain the difference between IT and IS. Explain why you can buy IT, but you can never buy IS. What does that mean to you, as a potential future business manager?
With the given information, it is impossible to choose between the positive and negative solutions in part (b). Notice that the sum KE + in part (c) equals the total energy E found in part (a), as it should (except for a small discrepancy due to rounding). QUESTION: Does doubling the initial displacement double the speed of the object at the equilibrium point? Explain. (a) Yes, the maximum speed is directly proportional to the initial displacement. (b) No, it multiplies...