Question

22.4 quiz: work and power
question 5 of 10
a girl performed 50 j of work lifting a heavy box. it took her 5 seconds to lift
the box. what was her power?
a. 10 w
b. 250 w
c. 45 w
d. 50 w

Explanation:

Step1: Recall the formula for power

Power \( P=\frac{W}{t} \), where \( W \) is work and \( t \) is time.

Step2: Substitute the given values

Given \( W = 50\space J \) and \( t=5\space s \). Then \( P=\frac{50}{5} \).

Step3: Calculate the power

\( P = 10\space W \)

Answer:

A. \( 10\space W \)