Question

A boy pushes a book by applying a force of 40N . Find the work done by this force as this book is displaced through 25 cm along the path

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Answer 1

Answer :

1 cm = 1/100 m

25 cm = 0.25 m

work = force × distance in direction of force

Force = 40 N

Distance = 0.25

= 40 × 0.25 = 10 Joules

Answer 2

Answer:

Work done is 10 J (joule)

Explanation:

Given that,

• A boy applies a force of 40N on a book to displace it for about 25cm.

Here, displacement and force is given we need to find the work done by the boy in this incident.

Using the formula :

➪ W = F • S

• "W" means "work done"

We have,

→ F (force) = 40N

→ S (displacement) = 25cm or, 0.25m

⟮∵ 1m = 100cm]

From the given values :

→ W = 40 • 0.25

→ W = 10 J

∴ The work done is 10 J (joule)

Note behind :

Units :

• The displacement is always measured in metres.

• Work done is measured by the unit "J" which means joule.