Question

Science
19.
A box is pushed through 4 m on a floor offering a resistance of 100 N.
The work done by the resisting force is
(1)
400 J
27
- 400 J
(3)
25 J
(4)
– 25 J​

Answer 1

Question : A box is pushed through 4 m on a floor offering a resistance of 100 N.

The work done by the resisting force is = ?

Answer : Work = F.s.cos θ ( θ = 180°)

Because work causes displacement sometimes.

Work = 100 × 4 × -1

Work = - 400 Joules

Hope it helps!