A wooden block of mass m resting on a rough horizontal table (coefficient of friction = µ) is pulled by a force F as shown in figure. The acceleration of the block moving horizontally is:
A
B
C
D
none
Text Solution
Verified by ExpertsThe correct answer is:
C
The normal reaction on the block is
N = mg – F sin θ
∴ Net force on block is
F cos θ – µN = F cos θ – µ mg + µF sin θ
or acceleration of the block is
a = 
= 
(cos θ + µsin θ ) – µg
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