SAT Subject Physics Practice Question 342: Answer and Explanation

Next steps

Question: 342

38. A very rich boy has an ice hockey practice floor that is essentially frictionless installed in a long refrigerated boxcar. As the train is moving, the boy practices shooting at the goal at the other end of the car. Just as he releases his shot, the train goes around a sharp curve to the left (looking forward in the direction the boy is shooting).Which statement most accurately describes the boy's shot?

A. It curves to the right and misses to the right side of the net.
B. It curves to the left and misses to the left side of the net.
C. It travels straight and misses to the right side of the net.
D. It travels straight and misses to the left side of the net.
E. It travels straight into the goal.

Correct Answer: C

Explanation:

The correct answer is (C). The two surfaces (hockey puck and ice) are essentially frictionless. The movement of the train around a curve has no effect on the puck, which continues to move in a straight line. The goal does move around the curve with the train. This moves the net to the left, while the puck travels in a straight line.

Previous       Next