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Byju's Answer

Standard XII

Physics

COM of Center of Masses

If force vect...

Question

If force vector is along $+ v e$ X-axis and radius vector is along $+ v e$ Y-axis , then the direction of torque is:

along +ve Z-axis

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along -ve Z-axis

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in XY plane making an angle

45^{o}

with X-axis

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in XY plane making an angle

135^{o}

with X-axis

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Solution

The correct option is B along -ve Z-axis
$\to τ = \to r \times \to F = r F (^j \times^i) = r F (-^k)$

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If force vector is along +ve X-axis and radius vector is along +ve Y-axis , then the direction of torque is:

The correct option is B along -ve Z-axis→τ=→r×→F=rF(^j×^i)=rF(−^k)

If force vector is along $+ v e$ X-axis and radius vector is along $+ v e$ Y-axis , then the direction of torque is:

The correct option is B along -ve Z-axis
$\to τ = \to r \times \to F = r F (^j \times^i) = r F (-^k)$