A body on the ground is acted on by a force of 10N at a...
PHYSICS
JAMB 1998
A body on the ground is acted on by a force of 10N at a point P as shown in the fig below. What force is needed to stop the body from moving eastwards?
- A. 5N in the direction of east
- B. 5N in the diretion of west
- C. 5V3N in the direction of west
- D. 10N in the southwest direction
Correct Answer: B. 5N in the diretion of west
Explanation
The horizontal (eastward) component of the 10N force is = 10 cos60
→ 10 x 0.5 = 5N.
The equilibrant force needed to stop the body moving eastward must act in exactly the
opposite direction.
Therefore, the needed force is 5N in the direction of West
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