A block of mass 5 kg is moving on an inclined plane which makes an angle of 
with the horizontal. Friction coefficient between the block and inclined plane surface is 
. The force to be applied on the block so that the block will move down without acceleration is 
N. 
.
Text Solution
Verified by ExpertsThe correct answer is:
C
For motion without acceleration, net force 
.
Component of weight along incline: 
down 
.
Normal force: 
.
Friction force opposing downward motion:
(up).
For equilibrium along the incline, applying force F down the incline:
, so 
, giving 
.
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