Question

An object does $210J$ of works in $7s$. What is its power?

Answer 1

Step 1: Data provided,

$$\begin{gathered} Work=210J \\ Time=7s \end{gathered}$$

Step 2: Formula used,

$Power=\frac{Work}{Time}$

Step 3: Calculation,

$$\begin{gathered} Power=\frac{Work}{Time} \\ =\frac{210J}{7s}=30W \end{gathered}$$

Hence, the required power is 30 W