A 2.8 kilogram block slides with a speed of 1.2 meter per second on a frictionless horizontal surface until it encounters a spring.
Part A. If the block compresses the spring 4.8 centimeter before coming to rest, find what is the force constant of the spring?
(N/m)
Part B. Find what initial speed should the block have to compress the spring by 1.2 centimeter?
(m/s)