What is the efficiency of a ramp if you do 400 J of work to push a 60 N box up the ramp until it is 3.0 m above the ground?

a longitudinal wave moves energy that is to the direction of the wave’s movement. - true

i will answer your question if you answer mine

when two balls of the different masses are dropped from equal height, they reach the ground at the same time .this is because they experience the same acceleration.

the acceleration is independent of mass.

thus when they are dropped they will always maintain the same velocity and travel the same distance (neglect air resistance of course) at the same time.