Question

A boy has to do 300j of work in time 0.5 mintue to lift a luggage to the roof of a bus. How much power does he spend ?

Answer 1

Explanation:

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Answer 2

Given,

Work done by the boy (w) = 300 joules

Time (t) = 0.5 minute

To find,

The power spend by the boy.

Solution,

We can simply solve this numerical problem by using the following process.

According to the definition of power,

$power = \frac{work}{time}$

Here, the given value of time is in Minute unit. We have to convert it into SI unit of time, which is Second.

1 minute = 60 seconds

0.5 minute = 60 × 0.5 = 30 seconds

So, by putting the given values we get,

$power =( \frac{300}{30}) W$

$power = 10 \: W$

(This will be considered as the final result.)

Hence, power spend by that boy was 10 W