vectors

Question: An object of m kg with speed of v m/s strikes a wall at an angle $\theta$ and rebounds at the same speed and same angle. The magnitude of the change in momentum of the object will be

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1) $2m\,v\,\cos \theta $

2) $2\,m\,v\,\sin \theta $

3) Zero

4) $2\,m\,v$

Solution:

Explanation: Explanation

addition-subtraction-vectors

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