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Grade 12AIPMT

A BLOCK OF MASS m IS PULLED ALONG A HORIZONTAL SURFACE BY APPLYING A FORCE AT AN ANGLE i WITH THE HORIZONTAL. THE FRICTION COEFFICIENT IS u . IF THE BLOCK TRAVELS AT A UNIFORM VELOCITY , THE WORK DONE BY THE APPLIED FORCE DURING A DISPLACEMENT d OF THE BLOCK WILL BE WHAT?

RAGINI SEIWAL

8 Years agoGrade 12

1 Answer

Eshan

8 Years ago

Dear student,

Since the block moves in the horizontal direction and the force is at an angle $i$ to the horizontal, the work done by applied force during displacement $d$ becomes

$W=\vec{F}.\vec{d}=F d cos i$

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