Question

Calculate the work done by the force of 15 N –Displacement of 2m in the opposite direction of applied force.​

Answer 1

Work Done : It is defined as work done by the body as the force exerted on the body along the direction of displacement . In mathematical form , it is represented as ,

➳ W = F × s × cosθ

SI unit : Joule

Force exerted (F) = 15 N

Displacement (s) = 2 m

Displacement is in opposite direction of applied force , so

⇒  θ = 180° $\;$

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➠ W = F × s × cos 180

➠ W = 15 × 2 × (-1)

➠ W = 30 × (-1)

➠ W = - 30 N  

Answer 2

Answer:

✳️ Given ✳️

• Force (F) = 15 N
• Displacement (s) = 2 m

✳️ To Find ✳️

• How much work done.

✳️ Formula Used ✳️

$\green\bigstar$ W = F × s × cos$\theta$ $\green\bigstar$

Where,

• F = applied force
• s = object displacement while the force is applied
• $\theta$ = angle between applied force and displacement

✳️ Solution ✳️

Given:-

• F = 15 N
• s = 2 m
• cos$\theta$ = 180

➕ According to the question by using formula we get,

$\implies$ W = 15 × 2 × cos180

$\implies$ W = 15 × 2 × (-1)

$\implies$ W = 30 × (-1)

$\dashrightarrow$ W = -30

$\therefore$ Work done by the force is -30.

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