Question

A constant force of 6 N acting on a stationary body displaces it by 3 m in 2 s. The average power delivered is

• A. 18 W
• B. 15 W
• C. 12 W
• D. 9 W
• E. 6 W

Hint:

Average power is calculated by dividing the work done by the time taken. It is crucial to consider both force and displacement.

Answer 1

The Correct Option is D

The average power delivered by a force is given by the formula: \[ P_{{avg}} = \frac{{Work Done}}{{Time Taken}} = \frac{F \cdot d}{t} \] 
where: 
- \(F = 6 \, {N}\) (force), 
- \(d = 3 \, {m}\) (displacement), 
- \(t = 2 \, {s}\) (time). 
Substituting the values: \[ P_{{avg}} = \frac{6 \times 3}{2} = 9 \, {W} \] 
Hence, the correct answer is (D).