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

(a) Frictional force along westward.

(b) Muscle force along southward.

(c) Frictional force along south-west.

(d) Muscle force along south-west.

This is a Multiple Choice Questions type Questions as classified in NCERT Exemplar

Answer- c

Explanation –consider the adjacent diagram

 OA= p₁= initial momentum of player northward

AB= p₂= final momentum of player towards west

OB= OA+AB

Change in momentum = P₂-P₁= AB-OA so we can say that AR will be along south west.

<p>This is a Multiple Choice Questions type Questions as classified in NCERT Exemplar</p><p><strong>Answer- c</strong></p><p><strong>Explanation</strong> –consider the adjacent diagram</p><div><div><picture><source srcset="https://images.shiksha.com/mediadata/images/articles/1745402352php8rpLU6_480x360.jpeg" media=" (max-width: 500px)"><img src="https://images.shiksha.com/mediadata/images/articles/1745402352php8rpLU6.jpeg" alt="" width="145" height="142"></picture></div></div><p>&nbsp;OA= p₁= initial momentum of player northward</p><p>AB= p₂= final momentum of player towards west</p><p>OB= OA+AB</p><div><div><picture><source srcset="https://images.shiksha.com/mediadata/images/articles/1745402383phpEAjyEI_480x360.jpeg" media=" (max-width: 500px)"><img src="https://images.shiksha.com/mediadata/images/articles/1745402383phpEAjyEI.jpeg" alt="" width="169" height="116"></picture></div></div><p>Change in momentum = P₂-P₁= AB-OA so we can say that AR will be along south west.</p>

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