Question

An elevator does 150 J of work in 30 seconds moving to the top floor. What is the power?

Answer 1

Given :-

Work = 150J

Time = 30 secs

To Find :-

Power

Solution :-

We know :-

$\bf P = \dfrac{W}{ t }$

Here :-

• P denotes Power.

• W denotes Work.

• t denotes Time.

By substituting the values we get :-

$: \implies \sf Power = \dfrac{150}{30}$

$\sf : \implies Power = \dfrac{15}{3}$

$: \implies \sf Power = 5W$

Power = 5 watt

Answer 2

Answer:

Given :-

• An elevator does 150 J of work in 30 seconds moving to the top floor.

To Find :-

• What is the power of an elevator.

Formula Used :-

$\clubsuit$ Power Formula :

$\longmapsto \sf\boxed{\bold{\pink{Power =\: \dfrac{Work}{Time}}}}$

Solution :-

Given :

$\bigstar$ Work = 150 J

$\bigstar$ Time = 30 seconds

According to the question by using the formula we get,

$\longrightarrow \sf Power =\: \dfrac{15\cancel{0}}{3\cancel{0}}$

$\longrightarrow \sf Power =\: \dfrac{\cancel{15}}{\cancel{3}}$

$\longrightarrow \sf Power =\: \dfrac{5}{1}$

$\longrightarrow \sf\bold{\red{Power =\: 5\: W}}$

$\therefore$ The power of an elevator is 5 W .