Question

A particle of mass m moves with constant speed v on a circular path of radius r .find magnitude of avg force on it in half revolution

Answer 1

Explanation:

Given the particle of mass, m is moving with constant velocity v.

As the given velocity is constant but the direction of velocity changes in the half revolution.

So change in momentum= final momentum - initial momentum = mv -( -mv) = 2mv

as we know Average force =

time taken

Change in momentum

So Time taken to complete half revolution=

Speed

Distance

=

v

πr

where r is the radiuaof the circular path and v is the constant speed.

Average force=

πr

2mv

2

…Answer