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

355625 A ball is thrown vertically upwards with a velocity of 10 \(m/s\). It returns to the ground with a velocity of 9 \(m/s\). If \(g = 9.8\;m/{s^2}\), then the maximum height attained by the is nearly ( assume air resistance to be uniform)

1 5.1 \(m\)
2 4.1 \(m\)
3 4.61 \(m\)
4 5.0 \(m\)
PHXI06:WORK ENERGY AND POWER

355626 Given that the displacement of the body in metre is a function of time as follows \(x=2 t^{4}+5\). The mass of the body is 2 \(kg\). What is the increase in its kinetic energy one second after that start of motion?

1 8 \(J\)
2 16 \(J\)
3 32 \(J\)
4 64 \(J\)
PHXI06:WORK ENERGY AND POWER

355627 Consider an elliptically shaped rail \(PQ\) in the vertical plane with \(OP = 6\;m\) and \(OQ = 8\;m\). A block of mass \(1\;kg\) is pulled along the rail from \(P\) to \(Q\) with a force of \(15\;N,\) which is always parallel to line \(PQ\) (see the figure given).
Assuming no frictional losses, the kinetic energy of the block when it reaches \(Q\) is \((n \times 10)\) joules.
The value of \(n\) is
(Take acceleration due to gravity \( = 10\;m{{\rm{s}}^{ - 2}}\))
supporting img

1 3
2 7
3 9
4 12
PHXI06:WORK ENERGY AND POWER

355628 A particle moves in a straight line with retardation proportional to its displacement. The loss in kinetic energy of the particle, for any displacement \(x\) is proportional to:

1 \(x^{2}\)
2 \(e^{x}\)
3 \(x\)
4 \(\log _{e}^{x}\)
PHXI06:WORK ENERGY AND POWER

355629 A block of mass 10 \(kg\) is moving in \(x\) - direction with a constant speed of 10 \(m/s\). It is subjected to a retarding force \(F = (0.1x)N\) during its travel from \(x = 20\,m\) to \(x = 30\,m\). Its final kinetic energy will be

1 475 \(J\)
2 450 \(J\)
3 275 \(J\)
4 250 \(J\)
PHXI06:WORK ENERGY AND POWER

355625 A ball is thrown vertically upwards with a velocity of 10 \(m/s\). It returns to the ground with a velocity of 9 \(m/s\). If \(g = 9.8\;m/{s^2}\), then the maximum height attained by the is nearly ( assume air resistance to be uniform)

1 5.1 \(m\)
2 4.1 \(m\)
3 4.61 \(m\)
4 5.0 \(m\)
PHXI06:WORK ENERGY AND POWER

355626 Given that the displacement of the body in metre is a function of time as follows \(x=2 t^{4}+5\). The mass of the body is 2 \(kg\). What is the increase in its kinetic energy one second after that start of motion?

1 8 \(J\)
2 16 \(J\)
3 32 \(J\)
4 64 \(J\)
PHXI06:WORK ENERGY AND POWER

355627 Consider an elliptically shaped rail \(PQ\) in the vertical plane with \(OP = 6\;m\) and \(OQ = 8\;m\). A block of mass \(1\;kg\) is pulled along the rail from \(P\) to \(Q\) with a force of \(15\;N,\) which is always parallel to line \(PQ\) (see the figure given).
Assuming no frictional losses, the kinetic energy of the block when it reaches \(Q\) is \((n \times 10)\) joules.
The value of \(n\) is
(Take acceleration due to gravity \( = 10\;m{{\rm{s}}^{ - 2}}\))
supporting img

1 3
2 7
3 9
4 12
PHXI06:WORK ENERGY AND POWER

355628 A particle moves in a straight line with retardation proportional to its displacement. The loss in kinetic energy of the particle, for any displacement \(x\) is proportional to:

1 \(x^{2}\)
2 \(e^{x}\)
3 \(x\)
4 \(\log _{e}^{x}\)
PHXI06:WORK ENERGY AND POWER

355629 A block of mass 10 \(kg\) is moving in \(x\) - direction with a constant speed of 10 \(m/s\). It is subjected to a retarding force \(F = (0.1x)N\) during its travel from \(x = 20\,m\) to \(x = 30\,m\). Its final kinetic energy will be

1 475 \(J\)
2 450 \(J\)
3 275 \(J\)
4 250 \(J\)
PHXI06:WORK ENERGY AND POWER

355625 A ball is thrown vertically upwards with a velocity of 10 \(m/s\). It returns to the ground with a velocity of 9 \(m/s\). If \(g = 9.8\;m/{s^2}\), then the maximum height attained by the is nearly ( assume air resistance to be uniform)

1 5.1 \(m\)
2 4.1 \(m\)
3 4.61 \(m\)
4 5.0 \(m\)
PHXI06:WORK ENERGY AND POWER

355626 Given that the displacement of the body in metre is a function of time as follows \(x=2 t^{4}+5\). The mass of the body is 2 \(kg\). What is the increase in its kinetic energy one second after that start of motion?

1 8 \(J\)
2 16 \(J\)
3 32 \(J\)
4 64 \(J\)
PHXI06:WORK ENERGY AND POWER

355627 Consider an elliptically shaped rail \(PQ\) in the vertical plane with \(OP = 6\;m\) and \(OQ = 8\;m\). A block of mass \(1\;kg\) is pulled along the rail from \(P\) to \(Q\) with a force of \(15\;N,\) which is always parallel to line \(PQ\) (see the figure given).
Assuming no frictional losses, the kinetic energy of the block when it reaches \(Q\) is \((n \times 10)\) joules.
The value of \(n\) is
(Take acceleration due to gravity \( = 10\;m{{\rm{s}}^{ - 2}}\))
supporting img

1 3
2 7
3 9
4 12
PHXI06:WORK ENERGY AND POWER

355628 A particle moves in a straight line with retardation proportional to its displacement. The loss in kinetic energy of the particle, for any displacement \(x\) is proportional to:

1 \(x^{2}\)
2 \(e^{x}\)
3 \(x\)
4 \(\log _{e}^{x}\)
PHXI06:WORK ENERGY AND POWER

355629 A block of mass 10 \(kg\) is moving in \(x\) - direction with a constant speed of 10 \(m/s\). It is subjected to a retarding force \(F = (0.1x)N\) during its travel from \(x = 20\,m\) to \(x = 30\,m\). Its final kinetic energy will be

1 475 \(J\)
2 450 \(J\)
3 275 \(J\)
4 250 \(J\)
NEET Test Series from KOTA - 10 Papers In MS WORD WhatsApp Here
PHXI06:WORK ENERGY AND POWER

355625 A ball is thrown vertically upwards with a velocity of 10 \(m/s\). It returns to the ground with a velocity of 9 \(m/s\). If \(g = 9.8\;m/{s^2}\), then the maximum height attained by the is nearly ( assume air resistance to be uniform)

1 5.1 \(m\)
2 4.1 \(m\)
3 4.61 \(m\)
4 5.0 \(m\)
PHXI06:WORK ENERGY AND POWER

355626 Given that the displacement of the body in metre is a function of time as follows \(x=2 t^{4}+5\). The mass of the body is 2 \(kg\). What is the increase in its kinetic energy one second after that start of motion?

1 8 \(J\)
2 16 \(J\)
3 32 \(J\)
4 64 \(J\)
PHXI06:WORK ENERGY AND POWER

355627 Consider an elliptically shaped rail \(PQ\) in the vertical plane with \(OP = 6\;m\) and \(OQ = 8\;m\). A block of mass \(1\;kg\) is pulled along the rail from \(P\) to \(Q\) with a force of \(15\;N,\) which is always parallel to line \(PQ\) (see the figure given).
Assuming no frictional losses, the kinetic energy of the block when it reaches \(Q\) is \((n \times 10)\) joules.
The value of \(n\) is
(Take acceleration due to gravity \( = 10\;m{{\rm{s}}^{ - 2}}\))
supporting img

1 3
2 7
3 9
4 12
PHXI06:WORK ENERGY AND POWER

355628 A particle moves in a straight line with retardation proportional to its displacement. The loss in kinetic energy of the particle, for any displacement \(x\) is proportional to:

1 \(x^{2}\)
2 \(e^{x}\)
3 \(x\)
4 \(\log _{e}^{x}\)
PHXI06:WORK ENERGY AND POWER

355629 A block of mass 10 \(kg\) is moving in \(x\) - direction with a constant speed of 10 \(m/s\). It is subjected to a retarding force \(F = (0.1x)N\) during its travel from \(x = 20\,m\) to \(x = 30\,m\). Its final kinetic energy will be

1 475 \(J\)
2 450 \(J\)
3 275 \(J\)
4 250 \(J\)
PHXI06:WORK ENERGY AND POWER

355625 A ball is thrown vertically upwards with a velocity of 10 \(m/s\). It returns to the ground with a velocity of 9 \(m/s\). If \(g = 9.8\;m/{s^2}\), then the maximum height attained by the is nearly ( assume air resistance to be uniform)

1 5.1 \(m\)
2 4.1 \(m\)
3 4.61 \(m\)
4 5.0 \(m\)
PHXI06:WORK ENERGY AND POWER

355626 Given that the displacement of the body in metre is a function of time as follows \(x=2 t^{4}+5\). The mass of the body is 2 \(kg\). What is the increase in its kinetic energy one second after that start of motion?

1 8 \(J\)
2 16 \(J\)
3 32 \(J\)
4 64 \(J\)
PHXI06:WORK ENERGY AND POWER

355627 Consider an elliptically shaped rail \(PQ\) in the vertical plane with \(OP = 6\;m\) and \(OQ = 8\;m\). A block of mass \(1\;kg\) is pulled along the rail from \(P\) to \(Q\) with a force of \(15\;N,\) which is always parallel to line \(PQ\) (see the figure given).
Assuming no frictional losses, the kinetic energy of the block when it reaches \(Q\) is \((n \times 10)\) joules.
The value of \(n\) is
(Take acceleration due to gravity \( = 10\;m{{\rm{s}}^{ - 2}}\))
supporting img

1 3
2 7
3 9
4 12
PHXI06:WORK ENERGY AND POWER

355628 A particle moves in a straight line with retardation proportional to its displacement. The loss in kinetic energy of the particle, for any displacement \(x\) is proportional to:

1 \(x^{2}\)
2 \(e^{x}\)
3 \(x\)
4 \(\log _{e}^{x}\)
PHXI06:WORK ENERGY AND POWER

355629 A block of mass 10 \(kg\) is moving in \(x\) - direction with a constant speed of 10 \(m/s\). It is subjected to a retarding force \(F = (0.1x)N\) during its travel from \(x = 20\,m\) to \(x = 30\,m\). Its final kinetic energy will be

1 475 \(J\)
2 450 \(J\)
3 275 \(J\)
4 250 \(J\)