Question

How much time will be required to perform 820 J of work at the rate of 20 w ?

Answer 1

Given :-

Work done = 820 J

Power applied = 20 W

To Find :-

Time required to perform the work.

Analysis :-

Here we are given with work done and the power applied.

Substitute the given values in the formula of work and you can easily find the time required.

Solution :-

We know that,

• p = Power
• w = Work done
• t = Time

Using the formula,

$\underline{\boxed{\sf Work \ done=Power \times Time}}$

Given that,

Power (p) = 20 W

Work (w) = 820 J

Substituting their values,

820 = 20 × t

t = 820/20

t = 41 s

Therefore, the time required is 41 sec.