A block of mass `m` is projected on a smooth horizontal circular track with velocity v what is the average normal force exered by the circular walls on the block during motion A to B?

Options

A. `(mv^(2))/(R )`
B. `(mv^(2))/(pi R )`
C. `(2mv^(2))/(R )`
D. `(2mv^(2))/(pi R )`

Answer

d

Explanation

Change in linear momentum of block
`| Deltap| = 2 mv`
Time taken to move from A to B
`Deltat = (pi p)/(v)`
Force exerted on the block