Question

Physics Help: (explanations must be shown) __________________________ A helicopter is rising at 4.7 m/s when a bag is dropped from it. (Assume that the positive direction is upward.) (a) After 2.0 s, what is the bag's velocity? (b) How far has the bag fallen? (c) How far below the helicopter is the bag? __________________________ A helicopter descends at 4.5 m/s as a bag is released from it. (Assume that the positive direction is upward.) (a) After 1.5 s, what is the bag's velocity? (b) How far has the bag fallen? (c) How far below the helicopter is the bag? ___________________________ A tennis ball is dropped from 1.27 m above the ground. It rebounds to a height of 1.00 m. (Assume that the positive direction is upward.) (a) With what velocity does it hit the ground? (b) With what velocity does it leave the ground? (c) If the tennis ball were in contact with the ground for 0.010 s, find its acceleration while touching the ground. (d) Compare the acceleration to g.