Work
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PHXI06:WORK ENERGY AND POWER

355761 Nature of work done by gravitational force
\(A\). may be negative
B. may be positive
\(C\). may be zero
\(D\). always positive

1 \(A\), \(B\) & \(D\) are correct
2 \(A\), \(B\) & \(C\) are correct
3 \(A\), \(C\) & \(D\) are correct
4 All correct
PHXI06:WORK ENERGY AND POWER

355762 Assertion :
A person is walking on a horizontal road with a load on his head. Work done by gravity is zero in this case.
Reason :
No work is said to be done, if directionsof force and displacement of load are perpendicular to each other.

1 Both Assertion and Reason are correct and Reason is the correct explanation of the Assertion.
2 Both Assertion and Reason are correct but Reason is not the correct explanation of the Assertion.
3 Assertion is correct but Reason is incorrect.
4 Assertion is incorrect but reason is correct.
PHXI06:WORK ENERGY AND POWER

355763 Assertion :
Centripetal force does no work.
Reason :
Force and displacement are perpendicular to each other.

1 Both Assertion and Reason are correct and Reason is the correct explanation of the Assertion.
2 Both Assertion and Reason are correct but Reason is not the correct explanation of the Assertion.
3 Assertion is correct but Reason is incorrect.
4 Assertion is incorrect but reason is correct.
PHXI06:WORK ENERGY AND POWER

355764 A gardener pushes a lawn roller through a distance 20 \(m\). If he applies a force of 20 \(kg\)-\(wt\) in a direction inclined at \(60^{\circ}\) to the ground, the work done by him is

1 196 \(kJ\)
2 1.96 \(J\)
3 196 \(J\)
4 1960 \(J\)
PHXI06:WORK ENERGY AND POWER

355765 A small block of mass \(m\) is kept on a rough inclined surface of inclination \(\theta\) fixed in a lift. The lift moves up with a uniform velocity \(v\) and the block does not slide on the incline. The work done by the force of friction on the block in time twill be:

1 \(m g v t \sin ^{2} \theta\)
2 Zero
3 \(m g v t \sin 2 \theta\)
4 \(m g v t \cos ^{2} \theta\)
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PHXI06:WORK ENERGY AND POWER

355761 Nature of work done by gravitational force
\(A\). may be negative
B. may be positive
\(C\). may be zero
\(D\). always positive

1 \(A\), \(B\) & \(D\) are correct
2 \(A\), \(B\) & \(C\) are correct
3 \(A\), \(C\) & \(D\) are correct
4 All correct
PHXI06:WORK ENERGY AND POWER

355762 Assertion :
A person is walking on a horizontal road with a load on his head. Work done by gravity is zero in this case.
Reason :
No work is said to be done, if directionsof force and displacement of load are perpendicular to each other.

1 Both Assertion and Reason are correct and Reason is the correct explanation of the Assertion.
2 Both Assertion and Reason are correct but Reason is not the correct explanation of the Assertion.
3 Assertion is correct but Reason is incorrect.
4 Assertion is incorrect but reason is correct.
PHXI06:WORK ENERGY AND POWER

355763 Assertion :
Centripetal force does no work.
Reason :
Force and displacement are perpendicular to each other.

1 Both Assertion and Reason are correct and Reason is the correct explanation of the Assertion.
2 Both Assertion and Reason are correct but Reason is not the correct explanation of the Assertion.
3 Assertion is correct but Reason is incorrect.
4 Assertion is incorrect but reason is correct.
PHXI06:WORK ENERGY AND POWER

355764 A gardener pushes a lawn roller through a distance 20 \(m\). If he applies a force of 20 \(kg\)-\(wt\) in a direction inclined at \(60^{\circ}\) to the ground, the work done by him is

1 196 \(kJ\)
2 1.96 \(J\)
3 196 \(J\)
4 1960 \(J\)
PHXI06:WORK ENERGY AND POWER

355765 A small block of mass \(m\) is kept on a rough inclined surface of inclination \(\theta\) fixed in a lift. The lift moves up with a uniform velocity \(v\) and the block does not slide on the incline. The work done by the force of friction on the block in time twill be:

1 \(m g v t \sin ^{2} \theta\)
2 Zero
3 \(m g v t \sin 2 \theta\)
4 \(m g v t \cos ^{2} \theta\)
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PHXI06:WORK ENERGY AND POWER

355761 Nature of work done by gravitational force
\(A\). may be negative
B. may be positive
\(C\). may be zero
\(D\). always positive

1 \(A\), \(B\) & \(D\) are correct
2 \(A\), \(B\) & \(C\) are correct
3 \(A\), \(C\) & \(D\) are correct
4 All correct
PHXI06:WORK ENERGY AND POWER

355762 Assertion :
A person is walking on a horizontal road with a load on his head. Work done by gravity is zero in this case.
Reason :
No work is said to be done, if directionsof force and displacement of load are perpendicular to each other.

1 Both Assertion and Reason are correct and Reason is the correct explanation of the Assertion.
2 Both Assertion and Reason are correct but Reason is not the correct explanation of the Assertion.
3 Assertion is correct but Reason is incorrect.
4 Assertion is incorrect but reason is correct.
PHXI06:WORK ENERGY AND POWER

355763 Assertion :
Centripetal force does no work.
Reason :
Force and displacement are perpendicular to each other.

1 Both Assertion and Reason are correct and Reason is the correct explanation of the Assertion.
2 Both Assertion and Reason are correct but Reason is not the correct explanation of the Assertion.
3 Assertion is correct but Reason is incorrect.
4 Assertion is incorrect but reason is correct.
PHXI06:WORK ENERGY AND POWER

355764 A gardener pushes a lawn roller through a distance 20 \(m\). If he applies a force of 20 \(kg\)-\(wt\) in a direction inclined at \(60^{\circ}\) to the ground, the work done by him is

1 196 \(kJ\)
2 1.96 \(J\)
3 196 \(J\)
4 1960 \(J\)
PHXI06:WORK ENERGY AND POWER

355765 A small block of mass \(m\) is kept on a rough inclined surface of inclination \(\theta\) fixed in a lift. The lift moves up with a uniform velocity \(v\) and the block does not slide on the incline. The work done by the force of friction on the block in time twill be:

1 \(m g v t \sin ^{2} \theta\)
2 Zero
3 \(m g v t \sin 2 \theta\)
4 \(m g v t \cos ^{2} \theta\)
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PHXI06:WORK ENERGY AND POWER

355761 Nature of work done by gravitational force
\(A\). may be negative
B. may be positive
\(C\). may be zero
\(D\). always positive

1 \(A\), \(B\) & \(D\) are correct
2 \(A\), \(B\) & \(C\) are correct
3 \(A\), \(C\) & \(D\) are correct
4 All correct
PHXI06:WORK ENERGY AND POWER

355762 Assertion :
A person is walking on a horizontal road with a load on his head. Work done by gravity is zero in this case.
Reason :
No work is said to be done, if directionsof force and displacement of load are perpendicular to each other.

1 Both Assertion and Reason are correct and Reason is the correct explanation of the Assertion.
2 Both Assertion and Reason are correct but Reason is not the correct explanation of the Assertion.
3 Assertion is correct but Reason is incorrect.
4 Assertion is incorrect but reason is correct.
PHXI06:WORK ENERGY AND POWER

355763 Assertion :
Centripetal force does no work.
Reason :
Force and displacement are perpendicular to each other.

1 Both Assertion and Reason are correct and Reason is the correct explanation of the Assertion.
2 Both Assertion and Reason are correct but Reason is not the correct explanation of the Assertion.
3 Assertion is correct but Reason is incorrect.
4 Assertion is incorrect but reason is correct.
PHXI06:WORK ENERGY AND POWER

355764 A gardener pushes a lawn roller through a distance 20 \(m\). If he applies a force of 20 \(kg\)-\(wt\) in a direction inclined at \(60^{\circ}\) to the ground, the work done by him is

1 196 \(kJ\)
2 1.96 \(J\)
3 196 \(J\)
4 1960 \(J\)
PHXI06:WORK ENERGY AND POWER

355765 A small block of mass \(m\) is kept on a rough inclined surface of inclination \(\theta\) fixed in a lift. The lift moves up with a uniform velocity \(v\) and the block does not slide on the incline. The work done by the force of friction on the block in time twill be:

1 \(m g v t \sin ^{2} \theta\)
2 Zero
3 \(m g v t \sin 2 \theta\)
4 \(m g v t \cos ^{2} \theta\)
Join With Us for More Updates
PHXI06:WORK ENERGY AND POWER

355761 Nature of work done by gravitational force
\(A\). may be negative
B. may be positive
\(C\). may be zero
\(D\). always positive

1 \(A\), \(B\) & \(D\) are correct
2 \(A\), \(B\) & \(C\) are correct
3 \(A\), \(C\) & \(D\) are correct
4 All correct
PHXI06:WORK ENERGY AND POWER

355762 Assertion :
A person is walking on a horizontal road with a load on his head. Work done by gravity is zero in this case.
Reason :
No work is said to be done, if directionsof force and displacement of load are perpendicular to each other.

1 Both Assertion and Reason are correct and Reason is the correct explanation of the Assertion.
2 Both Assertion and Reason are correct but Reason is not the correct explanation of the Assertion.
3 Assertion is correct but Reason is incorrect.
4 Assertion is incorrect but reason is correct.
PHXI06:WORK ENERGY AND POWER

355763 Assertion :
Centripetal force does no work.
Reason :
Force and displacement are perpendicular to each other.

1 Both Assertion and Reason are correct and Reason is the correct explanation of the Assertion.
2 Both Assertion and Reason are correct but Reason is not the correct explanation of the Assertion.
3 Assertion is correct but Reason is incorrect.
4 Assertion is incorrect but reason is correct.
PHXI06:WORK ENERGY AND POWER

355764 A gardener pushes a lawn roller through a distance 20 \(m\). If he applies a force of 20 \(kg\)-\(wt\) in a direction inclined at \(60^{\circ}\) to the ground, the work done by him is

1 196 \(kJ\)
2 1.96 \(J\)
3 196 \(J\)
4 1960 \(J\)
PHXI06:WORK ENERGY AND POWER

355765 A small block of mass \(m\) is kept on a rough inclined surface of inclination \(\theta\) fixed in a lift. The lift moves up with a uniform velocity \(v\) and the block does not slide on the incline. The work done by the force of friction on the block in time twill be:

1 \(m g v t \sin ^{2} \theta\)
2 Zero
3 \(m g v t \sin 2 \theta\)
4 \(m g v t \cos ^{2} \theta\)