Figure V-5 -A Small Railroad Car Is Pulled by a Rope as by a Rope

question 105

Multiple Choice

Figure V-5

-A small railroad car is pulled by a rope as shown in the sketch (top view) . The force F that the rope exerts on the car has a component along the track and another component perpendicular to the track. Judging from the diagram, the larger of these two components would be

• A)along the track.
• B)perpendicular to the track. These components will be equal if
• C)the rope makes an angle of 45° with the track.
• D)the rope is pulled in a direction along the track, rather than at an angle to it.
• E)they form an action-reaction pair on the car.
• F)but they can never really be equal.

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