Please read carefully and answer properly

Your Name:

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* 1. Your Name:

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A sled on ice moves in the ways described in the next three questions. 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 described in each statement below. Answer choice J if you think that none is correct. 

<span style="color: #000000;">A sled on ice moves in the ways described in the next three questions. 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 described in each statement below. Answer choice J if you think that none is correct. </span>
Which force would keep the sled moving toward the right and speeding up at a steady rate (constant acceleration)?

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* 2. Which force would keep the sled moving toward the right and speeding up at a steady rate (constant acceleration)?

Which force would keep the sled moving toward the right at a steady (constant) velocity?

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* 3. Which force would keep the sled moving toward the right at a steady (constant) velocity?

The sled is slowing down at a steady rate and has an acceleration to the right. Which force would account for this motion?

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* 4. The sled is slowing down at a steady rate and has an acceleration to the right. Which force would account for this motion?

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The next three questions refer to a coin which is tossed straight up into the air. After it is released it moves upward, reaches its highest point and falls back down again. Use one of the following choices (A through G) to indicate the force acting on the coin for each of the cases described below. Answer choice J if you think that none is correct. Ignore any effects of air resistance.

The next three questions&nbsp;refer to a coin which is tossed straight up into the air. After it is released it moves upward, reaches its highest point and falls back down again.&nbsp;Use one of the following choices (A through G) to indicate the force acting on the coin for each of the cases described below. Answer choice J if you think that none is correct. Ignore any effects of air resistance.
The coin is moving upward after it is released.

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* 5. The coin is moving upward after it is released.

The coin is at its highest point.

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* 6. The coin is at its highest point.

The coin is moving downward.

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* 7. The coin is moving downward.

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The questions below refer to collisions between a car and truck. For each description of a collision, choose the one answer from the possibilities (A though J) that best describes the forces between the car and the truck.

The questions below&nbsp;refer to collisions between a car and truck. For each description of a collision, choose the one answer from the possibilities (A though J) that best describes the forces between the car and the truck.

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Truck is much heavier than the car

Truck is much heavier than the car
They are both moving at the same speed when they collide. Which choice describes the forces?

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* 8. They are both moving at the same speed when they collide. Which choice describes the forces?

The car is moving much faster than the heavier truck when they collide. Which choice describes the forces?

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* 9. The car is moving much faster than the heavier truck when they collide. Which choice describes the forces?

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Use this figure for the following questions.

Use this figure for the following questions.
The sled is pulled up a steeper hill of the same height as the hill described above. How will the velocity of the sled at the bottom of the hill (after it has slid down) compare to that of the sled at the bottom of the original hill? Choose the best answer below.

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* 10. The sled is pulled up a steeper hill of the same height as the hill described above. How will the velocity of the sled at the bottom of the hill (after it has slid down) compare to that of the sled at the bottom of the original hill? Choose the best answer below.

The sled is pulled up a higher hill that is less steep than the original hill described above. How does the speed of the sled at the bottom of the hill (after it has slid down) compare to that of the sled at the bottom of the original hill?

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* 11. The sled is pulled up a higher hill that is less steep than the original hill described above. How does the speed of the sled at the bottom of the hill (after it has slid down) compare to that of the sled at the bottom of the original hill?

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