FMCE copyrighted by Ron Thornton and David Sokolof. Script copyrighted by Aaron Titus. Physlets copyrighted by Wolfgang Christian.
A sled on ice moves in the ways shown in the animations in questions 1-7 below. Friction is so small that it can be ignored. A person wearing spiked shoes standing on the ice can apply a force to the sled and push it along the ice. Choose the one force (A through G) which would keep the sled moving as shown in each animation shown below. To view an animation click on the hyperlink.
You may choose a choice more than once or not at all but choose only one answer for each blank. If you think that none is correct, answer choice J.
| A. The force is toward the right and is increasing in
strength (magnitude). B. The force is toward the right and is of constant strength (magnitude). C. The force is toward the right and is decreasing in strength (magnitude). |
D. No applied force is needed. E. The force is toward the left
and is decreasing in strength (magnitude). F. The force is toward the left and is of constant strength (magnitude). G. The force is toward the left and is increasing in strength (magnitude). |
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