A particle of mass m = 5 units is moving with a uniform speed ν = 32 units in the XY-plane along the line y = x + 4. The magnitude of the angular momentum about origin is
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a
zero
b
60 units
c
7.5 units
d
402 units
answer is B.
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Detailed Solution
From the figure, r1=4sin45°=22 units The magnitude of the angular momentum,L=mvr⊥=5(32)(22)=60 units