AIIMS2010Physics-Work, Energy and Power
AIIMS 2010 Physics Work Done by a Force MCQ Question
Type: MCQ-numerical-Hard-Class 11
A block of mass m is pulled along a horizontal surface by applying a force at an angle θ with the horizontal. If the block travels with a uniform velocity and has a displacement d and the coefficient of friction is μ, then the work done by the applied force is
A
μmgd / (cos θ + μ sin θ)
B
μmgd cos θ / (cos θ + μ sin θ)
C
μmgd sin θ / (cos θ + μ sin θ)
D
μmgd cos θ / (cos θ - μ sin θ)
Correct Answer
Option B
Detailed Explanation
Because the block moves with a uniform velocity, the resultant force is zero.
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