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

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.