Question

An object is displaced by 20 meters in the direction of applied force. If the applied force is 125N, calculate the work done by the force.

Answer 1

Answer:

2500 J

Explanation:

Since we know that work done= f x s cos a (where a is an angle between force and displacement) and angle is 0 therefore work will be force x displacement.

Answer 2

Given :-

An object is displaced by 20 meters in the direction of applied force. If the applied force is 125N, calculate the work done by the force.

Solution :-

• We know that, Work done (W) = F.s i.e dot product of force and displacement

       W = F.s = Fs cosθ

• Here, the body has displaced in the direction of applied force. So, θ = 0°

    ⇒ W = 125 × 20 × cos0°

    ⇒ W = 2500  J                   ( ∵ cos0° = 1)

∴ The work done is 2500 J

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