Torque and Angular Momentum
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PHXI07:SYSTEMS OF PARTICLES AND ROTATIONAL MOTION

366149 The moment of the force, \(\vec{F}=4 \hat{i}+5 \hat{j}-6 \hat{k}\) at \((2,0,-3)\), about the point \((2,-2,-2)\), is given by

1 \(-7 \hat{i}-8 \hat{j}-4 \hat{k}\)
2 \(-7 \hat{i}-4 \hat{j}-8 \hat{k}\)
3 \(-4 \hat{i}-\hat{j}-8 \hat{k}\)
4 \(-8 \hat{i}-4 \hat{j}-7 \hat{k}\)
NEET - 2018
PHXI07:SYSTEMS OF PARTICLES AND ROTATIONAL MOTION

366150 A rigid massless rod \(AB\) of length \(1\;m\) is placed horizontally on two rigid supports at its ends as shown in figure. A weight \(10\;N\) is hung from a point \(C\) at a distance \(30\;cm\) from \(A\). Find the reactions at the supports \(A\) and \(B\) respectively.
supporting img

1 \(5\;N,\,\,5\;N\)
2 \(7\;N,\,\,3\;N\)
3 \(10\;N,\,0\;N\)
4 \(3\;N,\,7\;N\)
PHXI07:SYSTEMS OF PARTICLES AND ROTATIONAL MOTION

366151 A horizontal force F is applied such that the block remains stationary then which of the following statement is false
supporting img

1 \(\mathrm{F}=\mathrm{N}\) (where \(\mathrm{N}\) is the normal force)
2 N will not produce torque
3 \(f=\mathrm{mg}\) (where \(\mathrm{f}\) is the frictional force)
4 \(\mathrm{F}\) will not produce torque
PHXI07:SYSTEMS OF PARTICLES AND ROTATIONAL MOTION

366152 Consider a light rod \((AB)\) as shown in the figure. At the two ends (\(A\) and \(B\) ) of which two equal parallel forces act in two cases. Then the net force and torque about point O in both cases (i) and (ii) are
supporting img

1 (i) \(\sum F=0 \quad \sum \tau_{c}=0\)
(ii) \(\sum F=0 \quad \sum \tau_{c} \neq 0\)
2 (i) \(\sum F \neq 0 \quad \sum \tau_{c}=0\)
(ii) \(\sum F=0 \quad \sum \tau_{c} \neq 0\)
3 (i) \(\sum F \neq 0 \quad \sum \tau_{c} \neq 0\)
(ii) \(\sum F=0 \quad \sum \tau_{c}=0\)
4 (i) \(\sum F \neq 0 \quad \sum \tau_{c} \neq 0\)
(ii) \(\sum F \neq 0 \quad \sum \tau_{c}=0\)
NEET DIGITAL LIBRARY
PHXI07:SYSTEMS OF PARTICLES AND ROTATIONAL MOTION

366149 The moment of the force, \(\vec{F}=4 \hat{i}+5 \hat{j}-6 \hat{k}\) at \((2,0,-3)\), about the point \((2,-2,-2)\), is given by

1 \(-7 \hat{i}-8 \hat{j}-4 \hat{k}\)
2 \(-7 \hat{i}-4 \hat{j}-8 \hat{k}\)
3 \(-4 \hat{i}-\hat{j}-8 \hat{k}\)
4 \(-8 \hat{i}-4 \hat{j}-7 \hat{k}\)
NEET - 2018
PHXI07:SYSTEMS OF PARTICLES AND ROTATIONAL MOTION

366150 A rigid massless rod \(AB\) of length \(1\;m\) is placed horizontally on two rigid supports at its ends as shown in figure. A weight \(10\;N\) is hung from a point \(C\) at a distance \(30\;cm\) from \(A\). Find the reactions at the supports \(A\) and \(B\) respectively.
supporting img

1 \(5\;N,\,\,5\;N\)
2 \(7\;N,\,\,3\;N\)
3 \(10\;N,\,0\;N\)
4 \(3\;N,\,7\;N\)
PHXI07:SYSTEMS OF PARTICLES AND ROTATIONAL MOTION

366151 A horizontal force F is applied such that the block remains stationary then which of the following statement is false
supporting img

1 \(\mathrm{F}=\mathrm{N}\) (where \(\mathrm{N}\) is the normal force)
2 N will not produce torque
3 \(f=\mathrm{mg}\) (where \(\mathrm{f}\) is the frictional force)
4 \(\mathrm{F}\) will not produce torque
PHXI07:SYSTEMS OF PARTICLES AND ROTATIONAL MOTION

366152 Consider a light rod \((AB)\) as shown in the figure. At the two ends (\(A\) and \(B\) ) of which two equal parallel forces act in two cases. Then the net force and torque about point O in both cases (i) and (ii) are
supporting img

1 (i) \(\sum F=0 \quad \sum \tau_{c}=0\)
(ii) \(\sum F=0 \quad \sum \tau_{c} \neq 0\)
2 (i) \(\sum F \neq 0 \quad \sum \tau_{c}=0\)
(ii) \(\sum F=0 \quad \sum \tau_{c} \neq 0\)
3 (i) \(\sum F \neq 0 \quad \sum \tau_{c} \neq 0\)
(ii) \(\sum F=0 \quad \sum \tau_{c}=0\)
4 (i) \(\sum F \neq 0 \quad \sum \tau_{c} \neq 0\)
(ii) \(\sum F \neq 0 \quad \sum \tau_{c}=0\)
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PHXI07:SYSTEMS OF PARTICLES AND ROTATIONAL MOTION

366149 The moment of the force, \(\vec{F}=4 \hat{i}+5 \hat{j}-6 \hat{k}\) at \((2,0,-3)\), about the point \((2,-2,-2)\), is given by

1 \(-7 \hat{i}-8 \hat{j}-4 \hat{k}\)
2 \(-7 \hat{i}-4 \hat{j}-8 \hat{k}\)
3 \(-4 \hat{i}-\hat{j}-8 \hat{k}\)
4 \(-8 \hat{i}-4 \hat{j}-7 \hat{k}\)
NEET - 2018
PHXI07:SYSTEMS OF PARTICLES AND ROTATIONAL MOTION

366150 A rigid massless rod \(AB\) of length \(1\;m\) is placed horizontally on two rigid supports at its ends as shown in figure. A weight \(10\;N\) is hung from a point \(C\) at a distance \(30\;cm\) from \(A\). Find the reactions at the supports \(A\) and \(B\) respectively.
supporting img

1 \(5\;N,\,\,5\;N\)
2 \(7\;N,\,\,3\;N\)
3 \(10\;N,\,0\;N\)
4 \(3\;N,\,7\;N\)
PHXI07:SYSTEMS OF PARTICLES AND ROTATIONAL MOTION

366151 A horizontal force F is applied such that the block remains stationary then which of the following statement is false
supporting img

1 \(\mathrm{F}=\mathrm{N}\) (where \(\mathrm{N}\) is the normal force)
2 N will not produce torque
3 \(f=\mathrm{mg}\) (where \(\mathrm{f}\) is the frictional force)
4 \(\mathrm{F}\) will not produce torque
PHXI07:SYSTEMS OF PARTICLES AND ROTATIONAL MOTION

366152 Consider a light rod \((AB)\) as shown in the figure. At the two ends (\(A\) and \(B\) ) of which two equal parallel forces act in two cases. Then the net force and torque about point O in both cases (i) and (ii) are
supporting img

1 (i) \(\sum F=0 \quad \sum \tau_{c}=0\)
(ii) \(\sum F=0 \quad \sum \tau_{c} \neq 0\)
2 (i) \(\sum F \neq 0 \quad \sum \tau_{c}=0\)
(ii) \(\sum F=0 \quad \sum \tau_{c} \neq 0\)
3 (i) \(\sum F \neq 0 \quad \sum \tau_{c} \neq 0\)
(ii) \(\sum F=0 \quad \sum \tau_{c}=0\)
4 (i) \(\sum F \neq 0 \quad \sum \tau_{c} \neq 0\)
(ii) \(\sum F \neq 0 \quad \sum \tau_{c}=0\)
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PHXI07:SYSTEMS OF PARTICLES AND ROTATIONAL MOTION

366149 The moment of the force, \(\vec{F}=4 \hat{i}+5 \hat{j}-6 \hat{k}\) at \((2,0,-3)\), about the point \((2,-2,-2)\), is given by

1 \(-7 \hat{i}-8 \hat{j}-4 \hat{k}\)
2 \(-7 \hat{i}-4 \hat{j}-8 \hat{k}\)
3 \(-4 \hat{i}-\hat{j}-8 \hat{k}\)
4 \(-8 \hat{i}-4 \hat{j}-7 \hat{k}\)
NEET - 2018
PHXI07:SYSTEMS OF PARTICLES AND ROTATIONAL MOTION

366150 A rigid massless rod \(AB\) of length \(1\;m\) is placed horizontally on two rigid supports at its ends as shown in figure. A weight \(10\;N\) is hung from a point \(C\) at a distance \(30\;cm\) from \(A\). Find the reactions at the supports \(A\) and \(B\) respectively.
supporting img

1 \(5\;N,\,\,5\;N\)
2 \(7\;N,\,\,3\;N\)
3 \(10\;N,\,0\;N\)
4 \(3\;N,\,7\;N\)
PHXI07:SYSTEMS OF PARTICLES AND ROTATIONAL MOTION

366151 A horizontal force F is applied such that the block remains stationary then which of the following statement is false
supporting img

1 \(\mathrm{F}=\mathrm{N}\) (where \(\mathrm{N}\) is the normal force)
2 N will not produce torque
3 \(f=\mathrm{mg}\) (where \(\mathrm{f}\) is the frictional force)
4 \(\mathrm{F}\) will not produce torque
PHXI07:SYSTEMS OF PARTICLES AND ROTATIONAL MOTION

366152 Consider a light rod \((AB)\) as shown in the figure. At the two ends (\(A\) and \(B\) ) of which two equal parallel forces act in two cases. Then the net force and torque about point O in both cases (i) and (ii) are
supporting img

1 (i) \(\sum F=0 \quad \sum \tau_{c}=0\)
(ii) \(\sum F=0 \quad \sum \tau_{c} \neq 0\)
2 (i) \(\sum F \neq 0 \quad \sum \tau_{c}=0\)
(ii) \(\sum F=0 \quad \sum \tau_{c} \neq 0\)
3 (i) \(\sum F \neq 0 \quad \sum \tau_{c} \neq 0\)
(ii) \(\sum F=0 \quad \sum \tau_{c}=0\)
4 (i) \(\sum F \neq 0 \quad \sum \tau_{c} \neq 0\)
(ii) \(\sum F \neq 0 \quad \sum \tau_{c}=0\)