Question

A body is pushed through a distance of 2 m with
constant velocity across a surface offering 50 N
resistance. The work done by applied force is
(1) 400 J
(2) - 100 J
(3) 100 J
(4) -25 J​

Answer 1

Given:-

• Displacement ,s = 2m
• Force ,F = 50N

To Find:-

• Work done by force ,W

Solution:-

According to the Question

We have to calculate the work done by applied force .

As we know that work done is calculated by the product of force & displacement .

• W = Fs

where,

• F denote Force
• W denote Work done
• s denote displacement

Substitute the value we get

$:\implies$ W = 50×2

$:\implies$ W = 100 J

• Hence, the work done by the applied force is 100 J

So ,the required option is ( c ) 100 J .

Answer 2

Given :-

A body is pushed through a distance of 2 m with  constant velocity across a surface offering 50 N  resistance

To Find :-

Work done

Solution :-

We know that

Work done = Force × Distance

Work done = 50 × 2

Work done = 100 J

Know More :-

SI unit of Force is Newton (N).

SI unit of length is metre(M)

SI unit of Work is Joule(J)

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