Question

Calculate the work done when a force of 20N displaces a body by 50 m

Answer 1

Answer:

1000 J

Explanation:

Given :

Force F = 20 N

Displacement s = 50 m

We are asked to find Work done :

We know :

Work done = Force × displacement

i.e. W = F s

Putting values here we get :

W = 20 × 50 J

= > W = 1000 J

Therefore , required work done is 1000 J.

Answer 2

Answer:

• The Work done (W) by the force is 1000 Joules.

Given:

1. Applied Force (F) = 20 N.
2. Displacement (s) = 50 m

Explanation:

$\rule{300}{1.5}$

Work Done:

It is the scalar product of the force and Displacement and the cosine of the angle between the force and displacement.

Expression:

• W = F . s cos∅

Units:

• S.I units:- Joules
• C.G.S units:- ergs

Dimensional Formula:

• M L² T⁻²

$\rule{300}{1.5}$

$\rule{300}{1.5}$

From the formula,

⇒ W = F . s

Where,

• W Denotes Work Done.
• F Denotes Force.
• s Denotes Displacement.

Now,

⇒ W = F . s

Substituting the values,

⇒ W = 20 N × 50

⇒ W = 20 × 50

⇒ W = 1000

⇒ W = 1000 J

∴ The Work done (W) by the force is 1000 Joules.

$\rule{300}{1.5}$