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 \(F\)

Rearrange the formula to \(F=\frac{P}{v}\). Substitute \(P = 10\space W\) and \(v=2\space m/s\) into the formula: \(F=\frac{10}{2}\).

Answer:

D. \(5\space N\)