Question

Calculate the force exerted by a ball of mass 100 gm moving with velocity 10 m/s when strikes a wall and bounces back at 8 m/s. The ball remains in contact with the wall for 0.1 sec.

Answer 1

Answer:

-2 N

Explanation:Force= Mass X Acceleration.

OR Force= Mass X (Final velocity- initial velocity)/time

In the given question,

mass= 100gms=0.1 kg

initial velocity= 10 m/s

final velocity= 8 m/s

time of contact= 0.1 m/s

force= 0.1 X (8-10)/0.1

=0.1 x (-2)/0.1

= -2 Newton