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A block of mass M is placed at rest on a horizontal rough surface with angle of friction a . the block is pulled with a force at an angle B WITH THE HORIZONTAL . the minimum value of F required to move the block

A block of mass M is placed at rest on a horizontal rough surface with angle of friction a . the block is pulled with a force at an angle  B WITH THE HORIZONTAL . the minimum value of F required to move the block

Grade:12

1 Answers

Vikas TU
14149 Points
7 years ago
Forces acting on block :
FcosB – f = Mb
f = a*Mg
put f in main eqn.
we get,
FcosB = Mga + Mb
dF/db = 0 for Min. F. Hence.
 
Or alternative,
 
FcosB. > = f .

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