A 2-kg block is released from rest at the top of a 20-mlong frictionless ramp that is 4 m high. At the same time, an identical block is released next to the ramp so that it drops straight down the same 4 m. What are the values for each of the following for the blocks just before they reach ground level? Which quantities are the same for the two blocks?
a. gravitational potential energy
b. kinetic energy
c. speed
d. momentum
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