Q 11-04-008NEETNEET 2023Top questionEasy
A football player is moving southward and suddenly turns eastward with the same speed to avoid an opponent. The force that acts on the player while turning is :
Answer: (C) along north-east
The force is along the change in momentum, $\Delta\vec{v} = \vec{v}_f - \vec{v}_i$.
$\vec{v}_i = v$ (south) and $\vec{v}_f = v$ (east), so
$$\Delta\vec{v} = v\,\hat{E} - v\,\hat{S} = v\,\hat{E} + v\,\hat{N}$$
Equal east and north components: the force is towards the north-east.
Solution by Sreeraj P, M.Sc Physics