Mechanical Engineering > GATE 2016 SET-2 > Dynamics
A point mass having mass M is moving with a velocity V at an angle θ to the wall as shown in the figure. The mass undergoes a perfectly elastic collision with the smooth wall and rebounds. The total change (final minus initial) in the momentum of the mass is
A
-2MVcosθ j
B
2MVsinθ j
C
2MVcosθ j
D
-2MVsinθ j

Correct : d

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