A spring-mass system is shown in the figure above. Mass B (300g)
is initially 23 cm from mass A (100g), traveling at 2.0 m s . The
coefficient of kinetic friction with the surface is 0.21 and the
coefficient of static friction is 0.54. Suppose the two blocks
collide elastically and the spring constant is 32 N m

1. Calculate the speed of block B immediately before colliding
with block A.

2. Suppose the collision takes a negligible amount of time so
that friction may be ignored for the time of the collision.
Calculate the speed of the two blocks immediately after the
collision.

3. Calculate the maximum amount the spring is compressed.

4. Do the masses remain stopped after the spring is compressed
the maximum amount? How do you know? Provide calculations to
support your answer and reasoning.