A hockey player is moving northward and suddenly turns westward with the same speed to avoid an opponet. 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-west.

Answer

C

Explanation

Consider the adjacent diagram
`Let OA =P_(1)`
`=` initial momentum of player northward
`AB =P_(2)` Final momentum of player towards west.
Clearly `OB =OA +AB`
Change in momentum `=p_(2) -p_(1)`
`=AB -OA =AB + (-OA)`
= Cleraly resultant `AR` will be along south west
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