Question

Suppose, you are assigned a work in which you have to apply some force to stop a block which is moving towards the east. What could be the best possible direction of a force to stop the moving block?

• A. West
• B. East
• C. South
• D. North

Answer 1

The correct option is A

West

Since the block is moving eastwards, hence a force of certain magnitude acting westwards would be the best possible alternative to stop the box in minimum time. From here we conclude that force is a physical quantity whose description requires both magnitude and direction in which it acts. We cannot say about the effect of a force without knowing its direction.