Question

9. A billiard ball of mass 7 kg is moving in horizontal direction with a speed of 2 m/s towards a wall. After collision with the wall, the ball moves with a speed of 1 m/s in a direction making an angle 120° with its initial direction. The duration of collision between wall and ball is 0.01s. The magnitude of average force applied by the wall on the ball is
a. 10 root 7 N
b. 700 N
C. 70 N
d. 100 root 21N​

Answer 1

Answer:

700 newton

Explanation:

we use a formula

f=m(∆v/∆t)