A particle of mass m is projected with velocity v making an angle of 45° with the horizontal. When the particle lands on the level ground the magnitude of the change in its momentum will be

Question

Dr. Abubacker · Accepted Answer

[Solution from source] The horizontal momentum mv cos 45° is unchanged, while the vertical component mv sin 45° reverses. The change is 2mv sin 45° = √2 mv. The answer is not zero, because momentum is a vector and its direction has changed even though the speed is the same. Answer (4).

Q. A particle of mass m is projected with velocity v making an angle of 45° with the horizontal. When the particle lands on the level ground the magnitude of the change in its momentum will be

Explanation

Reviewed by Dr. Abubacker

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