Question

If a ball of mass 0.1 kg hits the ground from the height of 20 m and bounce back to the same height, then find out the force exerted on the ball if the time of impact is 0.04 sec.
(Take g = 10 m/s2)

• A. $100\ N(+\hat{j})$
• B. $200\ N(+\hat{j})$
• C. $100\ N(-\hat{j})$
• D. $1000\ N(+\hat{j})$

Answer 1

Answer: (A)

$100\ N(+\hat{j})$

Answer 2

The correct option is (A): $100\ N(+\hat{j})$.