Workers use a force of 2125 N to push a piano weighing 8800 N up a 20.0 m long ramp. a.) How
much work is done on the piano by the workers in pushing it up the ramp?

b.) The piano is being
moved from street level to the second floor of a building. The second floor is 4.0 m above street level.
If the workers decide to lift the piano straight up by using ropes, how much work would they do?

c.) What is the efficiency of the ramp?

A250-n box is at rest on a frictionless horizotal floor. then a person shoves the box with a non-zero force of magnitude p. which statement best describes the relationship betweeen p and the motion of the box after it was shoved? -the box will not move when p< 250n but otherwise will accelerate at a constant rate that is directly proportional to p - the box will begin moving at a speed that is directly proportional to p, then will gradually slow to a halt -the box will move with constant velocity at a speed that is directly proportional to p -box will accelerate across the floor at a constant rate that is directly proportional to p