A block of mass m is stationary with respect to wedge of mass M moving with uniform speed v on horizontal surface. Find the work done by friction force on the block in t second
A
Zero
B
– 
sin 2θ
sin 2θ
C
– 
D
– 
sin 2 θ
sin 2 θ
Text Solution
Verified by ExpertsThe correct answer is:
B
f r = mg sin θ
Work done by fr = – mg sin θ cos θ vt
s= – 
(v ×t)
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