Four boxes of increasing size and weight must be pushed up a ramp. To push the boxes at the same speed, what must you do?
Responses
A Push the boxes with the same force, smoothly up the ramp..Push the boxes with the same force, smoothly up the ramp..
B The larger and heavier the box, the more force you must use when pushing.The larger and heavier the box, the more force you must use when pushing.
C Push the boxes with the same force, at exactly the same speed, up the ramp.Push the boxes with the same force, at exactly the same speed, up the ramp.
D Push the largest box with the most force; push the others with about the same force.