question_answer

A wheelchair is pushed from West to East, as    shown in the given figure. After traveling some distance, it takes two left turns. Finally, it takes a right turn and comes to a halt. Before the wheelchair comes to a halt, the direction of force on it is from: (a) West to East                (b) East to West (c) North to South           (d) South to North

Answer:

Here, we need to investigate the relation between the direction of force and the motion of the wheelchair. The direction of force on the wheel chair will be along its direction of motion. Initially the wheel chair is pushed from West to East. It then takes two left turns, i.e., the direction of motion of the wheelchair becomes reverse, (from East to West).