Question

A ball of mass 150 g moves with 12 m/s and bounces back after hitting a wall with 20 m/s after a small duration of 0.01 sec. Calculate the force applied to the ball when it hits the wall. SHOW IN A PHOTO WITH CLEAR SOLUTION

Answer 1

Given:-

• Mass of ball (m) = 150g

• Initial velocity (u) = 12m/s

• Final velocity (v) = 20m/s

• Time taken (t) = 0.01s

To Find:-

• Force applied on the ball (F) .

Solution:-

As we know that acceleration is the rate of change of velocity at per unit time .

→ a = v-u/t

Substitute the value we get

→ a = 20-12/0.01

→ a = 8/0.01

→ a = 800m/s²

And Now Force is defined as the product of mass and acceleration.

→ F = m×a

Substitute the value we get

→ F = 150/1000×800

→ F = 0.15 ×800

→ F = 120N

∴ The force applied on the ball is 120 Newton.