Question
Question: A block of mass m is stationary with respect to wedge of mass M moving with uniform speed v on horiz...
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 2q
C
– 
D
–
sin2q
Answer
– sin 2q
Explanation
Solution
fr = mg sinq
Work done by fr = – mg sinq cosq vt
s= –
(v ×t)