Exam 100% Correct!!
The image below shows the final energy distributions for an experiment done on the Gizmo. What
can be inferred from the graphs? - ANSWER B. The two objects were the same shape.
One winter day Lisa and Mary have a contest to see who can find an object that will roll or slide
down an icy hill in their neighborhood the fastest. Lisa picks a sled and Mary finds an old tire. They
release their objects and the sled wins the race. If Mary wishes to propose a rematch, what
conditions would most favor the tire? - ANSWER A. A race on a less steep, grassy hill
A Frisbee is rolling smoothly down a hill with a rotational kinetic energy of 30 Joules. What is the
most reasonable approximation for its translational kinetic energy? - ANSWER B. 45 Joules
Two objects are released simultaneously from the same height, down identical ramps. The object on
Ramp 1 narrowly wins the race. The graph shows the total energy of each object as it moves to the
bottom. Of the following choices, which is most likely the object on Ramp 2? - ANSWER D. Ring
Which would roll down a slanted desktop more quickly, a ballpoint pen full of ink or a ballpoint pen
after it has run out of ink? (Note: Assume that the total mass of an object does not affect the rate at
which it rolls.) - ANSWER A. The pen full of ink will always win the race.