A 0.540 kg block slides on a frictionless, horizontal surface with a speed of 1.13 m/s. The block encounters an unstretched spring and compresses it 25 cm before coming to rest.
(a) What is the force constant of this spring
(b) How long is the block in contact with the spring before it comes to rest?
(c) If the force constant of the spring is increased, does the time required to stop the block increase, decrease, or stay the same? Explain.
(a) When teh block stops, all of its kinetic energy will be transfered into spring potential energy.
In seven lines of explanation and computations, the problem is solved.