Question

A ball of mass m moves with speed v and it strikes normally with a wall and reflected back normally,if its time of contact with wall is t then find force exerted by ball on wall

Answer 1

Explanation:

cgncyvfdhcy so sry i need points

Answer 2

Answer:

The linear momentum of the ball before collision was p

1

=mv

after collision its direction was got reversed but with same speed so the new momentum will be p

2

=−mv

so the change in momentum will be Δp=p

2

−p

1

=−mv−mv=−2mv

So the force exerted will be F=

time

Δp

=

t

−2mv

whose magnitude

is

t

2mv