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4 Jul 2009 17:31:49 IST

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a block of mass 'M' is kept on a rough horizontal surface. The coefficient of static friction betwee

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a block of mass 'M' is kept on a rough horizontal surface. The coefficient of static friction between the block and surface is 'u'. The block is to be pulled by applying a force to it. What minimum force is needed to slide the block ? in which direction should the force act?

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Wile E. Coyote

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4 Jul 2009 17:51:35 IST

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The one below mine is the tru solution

SAVVEJ

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4 Jul 2009 18:04:50 IST

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The required minimum force is at an angle to the block with respect to ground.

SAVVEJ

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4 Jul 2009 18:08:14 IST

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plzz see the attachment....ignore the point of application of force of friction as it must be between the surfaces .ignore other small noticeable cut-marks too.

SAVVEJ

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4 Jul 2009 18:09:36 IST

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check for second derivative so deni.it is maximum for urself.

Wile E. Coyote

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4 Jul 2009 18:10:23 IST

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Well done savvej

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