If a box is on a ramp and is motionless, what is true about the forces acting on the box? a. they are all equal. b. their net value is zero. c. they all add up to the weight of the box. d. the vertical forces are equal and opposite, and the forces up and down the ramp are equal and opposite.

Agroup of students were investigating the force of gravity. they began by dropping a foam ball from a height of 3 meters into a bucket of sand. the ball hit the sand in 0.306 seconds. they dropped additional balls of approximately the same diameter, but of different masses. here is the data they collected. based on this experiment and the collected data, what would their conclusion be?