A 263-g block is dropped onto a vertical spring with force
constant k = 2.52 N/cm (see the figure below).
sticks to the spring, and the spring compresses 11.8 cm before coming
momentarily to rest.
While the spring is being compressed,
how much work is done
(a) by the force of gravity and
by the spring?
(c) What was the speed of the block just
before it hit the spring?
(d) If this initial speed of the
block is doubled, what is the maximum compression of the spring? Ignore