An object is in simple harmonic motion of the following quantities related to the object, which set of three can have maximum magnitudes at the same instant of time?
I. Displacement
II. Velocity
III. Acceleration
IV. Kinetic energy
V. Potential energy

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?