Work
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NEET DIGITAL LIBRARY
PHXI06:WORK ENERGY AND POWER

355770 Assertion :
Work done by the friction or viscous force on a moving body is negative.
Reason :
Work done is a scalar quantity which cannot be negative or positive.

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

355771 A ball of mass \(m\) moves with speed \(v\) and strikes a wall having infinite mass and it returns with same speed then the work done by the ball on the wall is

1 \(v / m J\)
2 Zero
3 \(m / v \cdot J\)
4 \(m v J\)
PHXI06:WORK ENERGY AND POWER

355772 A block of mass 1 \(kg\) slides down a rough inclined plane of inclination \(60^{\circ}\) starting from its top. If coefficient of kinetic friction is 0.5 and length of the plane \(d = 1\,m\) then work done aganist friction is

1 2.45 \(J\)
2 4.9 \(J\)
3 9.8 \(J\)
4 19.6 \(J\)
PHXI06:WORK ENERGY AND POWER

355773 The velocity-time graph of a particle of mass \(2\,kg\) , moving in a straight line, is given below.
supporting img
The work done by all the forces from \(t = 0\,s\) to
\(t = 2\,s\) on the particle is

1 \({400 J}\)
2 \({-400 J}\)
3 \({-200 J}\)
4 \({400 J}\)
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PHXI06:WORK ENERGY AND POWER

355770 Assertion :
Work done by the friction or viscous force on a moving body is negative.
Reason :
Work done is a scalar quantity which cannot be negative or positive.

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

355771 A ball of mass \(m\) moves with speed \(v\) and strikes a wall having infinite mass and it returns with same speed then the work done by the ball on the wall is

1 \(v / m J\)
2 Zero
3 \(m / v \cdot J\)
4 \(m v J\)
PHXI06:WORK ENERGY AND POWER

355772 A block of mass 1 \(kg\) slides down a rough inclined plane of inclination \(60^{\circ}\) starting from its top. If coefficient of kinetic friction is 0.5 and length of the plane \(d = 1\,m\) then work done aganist friction is

1 2.45 \(J\)
2 4.9 \(J\)
3 9.8 \(J\)
4 19.6 \(J\)
PHXI06:WORK ENERGY AND POWER

355773 The velocity-time graph of a particle of mass \(2\,kg\) , moving in a straight line, is given below.
supporting img
The work done by all the forces from \(t = 0\,s\) to
\(t = 2\,s\) on the particle is

1 \({400 J}\)
2 \({-400 J}\)
3 \({-200 J}\)
4 \({400 J}\)
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PHXI06:WORK ENERGY AND POWER

355770 Assertion :
Work done by the friction or viscous force on a moving body is negative.
Reason :
Work done is a scalar quantity which cannot be negative or positive.

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

355771 A ball of mass \(m\) moves with speed \(v\) and strikes a wall having infinite mass and it returns with same speed then the work done by the ball on the wall is

1 \(v / m J\)
2 Zero
3 \(m / v \cdot J\)
4 \(m v J\)
PHXI06:WORK ENERGY AND POWER

355772 A block of mass 1 \(kg\) slides down a rough inclined plane of inclination \(60^{\circ}\) starting from its top. If coefficient of kinetic friction is 0.5 and length of the plane \(d = 1\,m\) then work done aganist friction is

1 2.45 \(J\)
2 4.9 \(J\)
3 9.8 \(J\)
4 19.6 \(J\)
PHXI06:WORK ENERGY AND POWER

355773 The velocity-time graph of a particle of mass \(2\,kg\) , moving in a straight line, is given below.
supporting img
The work done by all the forces from \(t = 0\,s\) to
\(t = 2\,s\) on the particle is

1 \({400 J}\)
2 \({-400 J}\)
3 \({-200 J}\)
4 \({400 J}\)
NEET DIGITAL LIBRARY
PHXI06:WORK ENERGY AND POWER

355770 Assertion :
Work done by the friction or viscous force on a moving body is negative.
Reason :
Work done is a scalar quantity which cannot be negative or positive.

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

355771 A ball of mass \(m\) moves with speed \(v\) and strikes a wall having infinite mass and it returns with same speed then the work done by the ball on the wall is

1 \(v / m J\)
2 Zero
3 \(m / v \cdot J\)
4 \(m v J\)
PHXI06:WORK ENERGY AND POWER

355772 A block of mass 1 \(kg\) slides down a rough inclined plane of inclination \(60^{\circ}\) starting from its top. If coefficient of kinetic friction is 0.5 and length of the plane \(d = 1\,m\) then work done aganist friction is

1 2.45 \(J\)
2 4.9 \(J\)
3 9.8 \(J\)
4 19.6 \(J\)
PHXI06:WORK ENERGY AND POWER

355773 The velocity-time graph of a particle of mass \(2\,kg\) , moving in a straight line, is given below.
supporting img
The work done by all the forces from \(t = 0\,s\) to
\(t = 2\,s\) on the particle is

1 \({400 J}\)
2 \({-400 J}\)
3 \({-200 J}\)
4 \({400 J}\)
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