Work
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PHXI06:WORK ENERGY AND POWER

355787 Assertion :
Work done in uniform circular motion is zero.
Reason :
Force is always directed along displacement.

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

355788 The statements which show negative work are \(A\). Work done by force of viscosity which increases with increase in velocity. \(B\). Work done by attractive forces when particles are taken away from each other. \(C\). Work done when applied force decreases kinetic energy of the body. \(D\). Work done by gravity when a porter drops a suitcase from his head.

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

355789 The work done against gravity in taking 10 \(kg\) mass at 1 \(m\) height in1 sec will be

1 98 \(J\)
2 \(49 J\)
3 \(196 J\)
4 None of these
PHXI06:WORK ENERGY AND POWER

355790 A particle (mass \(m\) ) is projected with an initial velocity \(v\) at an angle \(\theta\) to the horizontal. What is the work done by the force of gravity from the instant of throwing to the instant it reaches the highest point?

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

355787 Assertion :
Work done in uniform circular motion is zero.
Reason :
Force is always directed along displacement.

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

355788 The statements which show negative work are \(A\). Work done by force of viscosity which increases with increase in velocity. \(B\). Work done by attractive forces when particles are taken away from each other. \(C\). Work done when applied force decreases kinetic energy of the body. \(D\). Work done by gravity when a porter drops a suitcase from his head.

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

355789 The work done against gravity in taking 10 \(kg\) mass at 1 \(m\) height in1 sec will be

1 98 \(J\)
2 \(49 J\)
3 \(196 J\)
4 None of these
PHXI06:WORK ENERGY AND POWER

355790 A particle (mass \(m\) ) is projected with an initial velocity \(v\) at an angle \(\theta\) to the horizontal. What is the work done by the force of gravity from the instant of throwing to the instant it reaches the highest point?

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

355787 Assertion :
Work done in uniform circular motion is zero.
Reason :
Force is always directed along displacement.

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

355788 The statements which show negative work are \(A\). Work done by force of viscosity which increases with increase in velocity. \(B\). Work done by attractive forces when particles are taken away from each other. \(C\). Work done when applied force decreases kinetic energy of the body. \(D\). Work done by gravity when a porter drops a suitcase from his head.

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

355789 The work done against gravity in taking 10 \(kg\) mass at 1 \(m\) height in1 sec will be

1 98 \(J\)
2 \(49 J\)
3 \(196 J\)
4 None of these
PHXI06:WORK ENERGY AND POWER

355790 A particle (mass \(m\) ) is projected with an initial velocity \(v\) at an angle \(\theta\) to the horizontal. What is the work done by the force of gravity from the instant of throwing to the instant it reaches the highest point?

1 \(-\dfrac{m v^{2} \sin ^{2} \theta}{2}\)
2 Zero
3 \(m v^{2} \sin ^{2} \theta\)
4 \(-m v^{2} \sin ^{2} \theta\)
For More Updates join with Us
PHXI06:WORK ENERGY AND POWER

355787 Assertion :
Work done in uniform circular motion is zero.
Reason :
Force is always directed along displacement.

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

355788 The statements which show negative work are \(A\). Work done by force of viscosity which increases with increase in velocity. \(B\). Work done by attractive forces when particles are taken away from each other. \(C\). Work done when applied force decreases kinetic energy of the body. \(D\). Work done by gravity when a porter drops a suitcase from his head.

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

355789 The work done against gravity in taking 10 \(kg\) mass at 1 \(m\) height in1 sec will be

1 98 \(J\)
2 \(49 J\)
3 \(196 J\)
4 None of these
PHXI06:WORK ENERGY AND POWER

355790 A particle (mass \(m\) ) is projected with an initial velocity \(v\) at an angle \(\theta\) to the horizontal. What is the work done by the force of gravity from the instant of throwing to the instant it reaches the highest point?

1 \(-\dfrac{m v^{2} \sin ^{2} \theta}{2}\)
2 Zero
3 \(m v^{2} \sin ^{2} \theta\)
4 \(-m v^{2} \sin ^{2} \theta\)
NEET DIGITAL LIBRARY