A small block of mass m is kept on a rough inclined surface with inclination angle 
, fixed in an elevator. The elevator goes down with a uniform velocity v, and the block does not slide on the wedge. The work done by the force of friction on the block in time t will be
A
B
C
D
Text Solution
Verified by ExpertsThe correct answer is:
C
frictional force 
Displacement of block in 
Work done by frictional force, 
[ 
is the angle between f and v]
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