The Work-Energy Theorem for a Constant/Variable Force
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PHXI06:WORK ENERGY AND POWER

355681 In the shown diagram mass \(A\) is \(m\) and that of \(B\) is 2 \(m\). All the surfaces are smooth. System is released from rest with spring unstretched. Then, the maximum extension \(\left(x_{m}\right)\) in spring will be:
supporting img

1 \(\dfrac{4 m g}{k}\)
2 \(\dfrac{m g}{k}\)
3 \(\dfrac{2 m g}{k}\)
4 \(\dfrac{3 m g}{k}\)
PHXI06:WORK ENERGY AND POWER

355682 The rate of decrease of kinetic energy is \(9.6\,J{s^{ - 1}}.\) Find the magnitude of force acting on particle when its speed is \(3\;m{s^{ - 1}}.\)

1 \(3.2\;N\)
2 \(4.8\;N\)
3 \(2.4\;N\)
4 \(5.6N\)
PHXI06:WORK ENERGY AND POWER

355683 Only one force is acting on a \(5\,kg\) object that is at rest, as indicated in the figure. Find the total work done by the force.
supporting img

1 \({90 J}\)
2 \({120 J}\)
3 \({180 J}\)
4 \({60 J}\)
PHXI06:WORK ENERGY AND POWER

355684 Identify the false statement from the following

1 Work-energy theorem holds in all inertial frames.
2 Work-energy theorem is not independent of Newton's second law.
3 No potential energy can be associated with friction.
4 Work done by friction over a closed path is zero.
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PHXI06:WORK ENERGY AND POWER

355681 In the shown diagram mass \(A\) is \(m\) and that of \(B\) is 2 \(m\). All the surfaces are smooth. System is released from rest with spring unstretched. Then, the maximum extension \(\left(x_{m}\right)\) in spring will be:
supporting img

1 \(\dfrac{4 m g}{k}\)
2 \(\dfrac{m g}{k}\)
3 \(\dfrac{2 m g}{k}\)
4 \(\dfrac{3 m g}{k}\)
PHXI06:WORK ENERGY AND POWER

355682 The rate of decrease of kinetic energy is \(9.6\,J{s^{ - 1}}.\) Find the magnitude of force acting on particle when its speed is \(3\;m{s^{ - 1}}.\)

1 \(3.2\;N\)
2 \(4.8\;N\)
3 \(2.4\;N\)
4 \(5.6N\)
PHXI06:WORK ENERGY AND POWER

355683 Only one force is acting on a \(5\,kg\) object that is at rest, as indicated in the figure. Find the total work done by the force.
supporting img

1 \({90 J}\)
2 \({120 J}\)
3 \({180 J}\)
4 \({60 J}\)
PHXI06:WORK ENERGY AND POWER

355684 Identify the false statement from the following

1 Work-energy theorem holds in all inertial frames.
2 Work-energy theorem is not independent of Newton's second law.
3 No potential energy can be associated with friction.
4 Work done by friction over a closed path is zero.
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PHXI06:WORK ENERGY AND POWER

355681 In the shown diagram mass \(A\) is \(m\) and that of \(B\) is 2 \(m\). All the surfaces are smooth. System is released from rest with spring unstretched. Then, the maximum extension \(\left(x_{m}\right)\) in spring will be:
supporting img

1 \(\dfrac{4 m g}{k}\)
2 \(\dfrac{m g}{k}\)
3 \(\dfrac{2 m g}{k}\)
4 \(\dfrac{3 m g}{k}\)
PHXI06:WORK ENERGY AND POWER

355682 The rate of decrease of kinetic energy is \(9.6\,J{s^{ - 1}}.\) Find the magnitude of force acting on particle when its speed is \(3\;m{s^{ - 1}}.\)

1 \(3.2\;N\)
2 \(4.8\;N\)
3 \(2.4\;N\)
4 \(5.6N\)
PHXI06:WORK ENERGY AND POWER

355683 Only one force is acting on a \(5\,kg\) object that is at rest, as indicated in the figure. Find the total work done by the force.
supporting img

1 \({90 J}\)
2 \({120 J}\)
3 \({180 J}\)
4 \({60 J}\)
PHXI06:WORK ENERGY AND POWER

355684 Identify the false statement from the following

1 Work-energy theorem holds in all inertial frames.
2 Work-energy theorem is not independent of Newton's second law.
3 No potential energy can be associated with friction.
4 Work done by friction over a closed path is zero.
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PHXI06:WORK ENERGY AND POWER

355681 In the shown diagram mass \(A\) is \(m\) and that of \(B\) is 2 \(m\). All the surfaces are smooth. System is released from rest with spring unstretched. Then, the maximum extension \(\left(x_{m}\right)\) in spring will be:
supporting img

1 \(\dfrac{4 m g}{k}\)
2 \(\dfrac{m g}{k}\)
3 \(\dfrac{2 m g}{k}\)
4 \(\dfrac{3 m g}{k}\)
PHXI06:WORK ENERGY AND POWER

355682 The rate of decrease of kinetic energy is \(9.6\,J{s^{ - 1}}.\) Find the magnitude of force acting on particle when its speed is \(3\;m{s^{ - 1}}.\)

1 \(3.2\;N\)
2 \(4.8\;N\)
3 \(2.4\;N\)
4 \(5.6N\)
PHXI06:WORK ENERGY AND POWER

355683 Only one force is acting on a \(5\,kg\) object that is at rest, as indicated in the figure. Find the total work done by the force.
supporting img

1 \({90 J}\)
2 \({120 J}\)
3 \({180 J}\)
4 \({60 J}\)
PHXI06:WORK ENERGY AND POWER

355684 Identify the false statement from the following

1 Work-energy theorem holds in all inertial frames.
2 Work-energy theorem is not independent of Newton's second law.
3 No potential energy can be associated with friction.
4 Work done by friction over a closed path is zero.
For More Updates join with Us
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