A hockey player is moving northward and suddenly turns westward with the same speed to avoid an opponent. The force that acts on the player is

Options

A. frictional force along westward
B. muscle force along southward
C. frictional force along south-west
D. muscle force along south-wes

Answer

C

Explanation

Frictional force along south - west
As show in diagram

Let OA = `p_(1)` initial momentum of player in north direction
AB = `p_(2) - ` Final momentum of player in west direction
By triangle law of vector addition
OB = OA + Ab

change in momentum
`=P_(2) =p_(1)`
From diagram it is clear that AR is in south - west direction