Question
A cricket player catches a ball of mass 0.1 kg moving with a speed of 10 m/s in 0.1 s. The force exerted by him is
- 10 N
- 5 N
- 2 N
- 1 N
Answer
10 N
Explanation
F = Δp/t
F = m(v-u)\over t
F = 0.1 \times (0-10)\over 0.1
F = -10 N
The negative sign indicates that the force is in the opposite direction to the motion of the ball.