A block of mass m is placed at rest on a horizontal rough surface with angle of friction - The block is pulled with a force F at an angle - with the horizontal- The minimum value of F required to move the block is-

The correct option is A mgsinϕ/cos ( θ ϕ ) From above concept F=mg sinϕcos (θ ϕ) ...

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Standard XII

Physics

Net Force

A block of ma...

Question

A block of mass $m$ is placed at rest on a horizontal rough surface with angle of friction $θ$ . The block is pulled with a force $F$ at an angle $ϕ$ with the horizontal. The minimum value of $F$ required to move the block is:

\frac{m g sin ϕ}{cos (θ - ϕ)}

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\frac{m g cos ϕ}{cos (θ - ϕ)}

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m g tan ϕ

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m g sin ϕ

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Solution

The correct option is A $\frac{m g sin ϕ}{cos (θ - ϕ)}$
From above concept

$F = \frac{m g sin ϕ}{cos (θ - ϕ)}$

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A block of mass m is placed at rest on a horizontal rough surface with angle of friction θ. The block is pulled with a force F at an angle ϕ with the horizontal. The minimum value of F required to move the block is:

The correct option is A mgsinϕcos(θ−ϕ)From above conceptF=mgsinϕcos(θ−ϕ)

A block of mass $m$ is placed at rest on a horizontal rough surface with angle of friction $θ$ . The block is pulled with a force $F$ at an angle $ϕ$ with the horizontal. The minimum value of $F$ required to move the block is:

The correct option is A $\frac{m g sin ϕ}{cos (θ - ϕ)}$
From above concept

$F = \frac{m g sin ϕ}{cos (θ - ϕ)}$