Question

a constant force delivers an average power of 10 w to a box. the average speed of the box is 2 m/s and the force is exerted in the direction of motion of the box. what is the magnitude of the force?
a 20 n
b 12 n
c 10 n
d 5 n

Explanation:

Step1: Recall the power formula

Power \( P = Fv \), where \( P \) is power, \( F \) is force, and \( v \) is velocity.

Step2: Solve for force \( F \)

Given \( P = 10\,\text{W} \) and \( v = 2\,\text{m/s} \). Rearranging the formula \( F=\frac{P}{v} \). Substitute the values: \( F=\frac{10}{2} \).

Answer:

D. \(5\,\text{N}\)