DATA ANALYSIS QUESTION: A small sphere rolls dow a track of constant length AB. The sphere is released from rest at A
The time T that the sphere takes to roll from A to B us measured for different values of height H.

A student suggests that t is proportional to 1/h. To test this hypothesis a graph is plotted as shown on the axes below. The uncertainty in t is shown.

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

Write down two additional questions about earth's magnetic field that will make your presentation more informative.

How can you increase the strength of an electromagnet?