Aball is dropped from the top of a tall building. slightly later a second ball is thrown downward and catches up with the first ball. when the two balls pass one another,
compare the magnitudes of their acceleration: (a) the acceleration of the second ball is greater.
(b) the acceleration of the first ball is greater.
(c) the acceleration of both balls is the same.
(d) the acceleration is larger for the second ball initially. the acceleration of the first ball is
lager later.
(e) the accelerations are both zero.

You have been hired to design a spring-launched roller coaster thatwill carry two passengers per car. the car goes up a 10-m highhill, then descends 15m to the track's lowest point. you'vedetermined that the spring can be compressed a maximum o 2.0m andthat a loaded car will have a maximum mass of 400kg. for safetyreasons, the spring constant should be 10% larger than the minimumneeded for the car to just make it over the top. a) what spring constant (k) should you specify ? b) what is the maximum speed of a 350 kg car if the spring iscompressed the full amount.