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  4. A ball is thrown up at an angle 45° with the horizontal. Then the total change of momentum by the instant it returns to ground is :-

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Q. A ball is thrown up at an angle $45^{\circ}$ with the horizontal. Then the total change of momentum by the instant it returns to ground is :-

Motion in a Straight Line

Solution:

$\Delta P =2\, mu\, \sin \theta$