2. A 25-kg crate rest atop a platform as shown at right. If the friction force acting on the block sliding is 120 N find: a) The work done by gravity as the block falls to the ground off the incline (Path A). b) The velocity of the block as it hits the ground. c) The work done by friction as the block slides down the incline (Path B) d) The velocity of the block as it hits the ground after sliding down the incline. A B 3 m 6 m