00. Work done by Force and Power
« First Topic in Next Topic: 01. Potential and Kinetic Energy »
For More Updates join with Us
Work, Energy and Power

148796 A car of mass ' $m$ ' accelerates on a level smooth road when a constant power ' $P$ ' is delivered to it. If the velocity of the car at any instant is ' $v$ ' then its velocity will be doubled after travelling a distance

1 $\frac{7 \mathrm{mv}^{3}}{3 \mathrm{P}}$
2 $\frac{4 m v^{3}}{3 P}$
3 $\frac{\mathrm{mv}^{3}}{\mathrm{P}}$
4 $\frac{18 \mathrm{mv}^{3}}{7 \mathrm{P}}$
AP EAMCET-25.04.2018
Work, Energy and Power

148797 The only force acting on a $2 \mathrm{~kg}$ body that is moving in xy plane has a magnitude of $5 \mathrm{~N}$. The body initially has a velocity of $4 \mathrm{~ms}^{-1}$ in the positive $x$ direction. Sometime later the body has a velocity of $6 \mathrm{~ms}^{-1}$ in the positive $y$ direction. The work done on the body by the 5 $\mathbf{N}$ force during this time is

1 $20 \mathrm{~J}$
2 $40 \mathrm{~J}$
3 $52 \mathrm{~J}$
4 $72 \mathrm{~J}$
AMU-2018
Work, Energy and Power

148798 If a machine perform $4000 \mathrm{~J}$ output work and $1000 \mathrm{~J}$ is inside loss due to friction, then find the efficiency?

1 $80 \%$
2 $30 \%$
3 $25 \%$
4 $60 \%$
JIPMER-2018
Work, Energy and Power

148799 If the efficiency of an engine is $50 \%$ and its work output is $500 \mathrm{~J}$, then find input.

1 $1000 \mathrm{~J}$
2 $500 \mathrm{~J}$
3 $100 \mathrm{~J}$
4 $250 \mathrm{~J}$
JIPMER-2018
NEET DIGITAL LIBRARY
Work, Energy and Power

148796 A car of mass ' $m$ ' accelerates on a level smooth road when a constant power ' $P$ ' is delivered to it. If the velocity of the car at any instant is ' $v$ ' then its velocity will be doubled after travelling a distance

1 $\frac{7 \mathrm{mv}^{3}}{3 \mathrm{P}}$
2 $\frac{4 m v^{3}}{3 P}$
3 $\frac{\mathrm{mv}^{3}}{\mathrm{P}}$
4 $\frac{18 \mathrm{mv}^{3}}{7 \mathrm{P}}$
AP EAMCET-25.04.2018
Work, Energy and Power

148797 The only force acting on a $2 \mathrm{~kg}$ body that is moving in xy plane has a magnitude of $5 \mathrm{~N}$. The body initially has a velocity of $4 \mathrm{~ms}^{-1}$ in the positive $x$ direction. Sometime later the body has a velocity of $6 \mathrm{~ms}^{-1}$ in the positive $y$ direction. The work done on the body by the 5 $\mathbf{N}$ force during this time is

1 $20 \mathrm{~J}$
2 $40 \mathrm{~J}$
3 $52 \mathrm{~J}$
4 $72 \mathrm{~J}$
AMU-2018
Work, Energy and Power

148798 If a machine perform $4000 \mathrm{~J}$ output work and $1000 \mathrm{~J}$ is inside loss due to friction, then find the efficiency?

1 $80 \%$
2 $30 \%$
3 $25 \%$
4 $60 \%$
JIPMER-2018
Work, Energy and Power

148799 If the efficiency of an engine is $50 \%$ and its work output is $500 \mathrm{~J}$, then find input.

1 $1000 \mathrm{~J}$
2 $500 \mathrm{~J}$
3 $100 \mathrm{~J}$
4 $250 \mathrm{~J}$
JIPMER-2018
Join With Us for More Updates
Work, Energy and Power

148796 A car of mass ' $m$ ' accelerates on a level smooth road when a constant power ' $P$ ' is delivered to it. If the velocity of the car at any instant is ' $v$ ' then its velocity will be doubled after travelling a distance

1 $\frac{7 \mathrm{mv}^{3}}{3 \mathrm{P}}$
2 $\frac{4 m v^{3}}{3 P}$
3 $\frac{\mathrm{mv}^{3}}{\mathrm{P}}$
4 $\frac{18 \mathrm{mv}^{3}}{7 \mathrm{P}}$
AP EAMCET-25.04.2018
Work, Energy and Power

148797 The only force acting on a $2 \mathrm{~kg}$ body that is moving in xy plane has a magnitude of $5 \mathrm{~N}$. The body initially has a velocity of $4 \mathrm{~ms}^{-1}$ in the positive $x$ direction. Sometime later the body has a velocity of $6 \mathrm{~ms}^{-1}$ in the positive $y$ direction. The work done on the body by the 5 $\mathbf{N}$ force during this time is

1 $20 \mathrm{~J}$
2 $40 \mathrm{~J}$
3 $52 \mathrm{~J}$
4 $72 \mathrm{~J}$
AMU-2018
Work, Energy and Power

148798 If a machine perform $4000 \mathrm{~J}$ output work and $1000 \mathrm{~J}$ is inside loss due to friction, then find the efficiency?

1 $80 \%$
2 $30 \%$
3 $25 \%$
4 $60 \%$
JIPMER-2018
Work, Energy and Power

148799 If the efficiency of an engine is $50 \%$ and its work output is $500 \mathrm{~J}$, then find input.

1 $1000 \mathrm{~J}$
2 $500 \mathrm{~J}$
3 $100 \mathrm{~J}$
4 $250 \mathrm{~J}$
JIPMER-2018
For More Updates join with Us
Work, Energy and Power

148796 A car of mass ' $m$ ' accelerates on a level smooth road when a constant power ' $P$ ' is delivered to it. If the velocity of the car at any instant is ' $v$ ' then its velocity will be doubled after travelling a distance

1 $\frac{7 \mathrm{mv}^{3}}{3 \mathrm{P}}$
2 $\frac{4 m v^{3}}{3 P}$
3 $\frac{\mathrm{mv}^{3}}{\mathrm{P}}$
4 $\frac{18 \mathrm{mv}^{3}}{7 \mathrm{P}}$
AP EAMCET-25.04.2018
Work, Energy and Power

148797 The only force acting on a $2 \mathrm{~kg}$ body that is moving in xy plane has a magnitude of $5 \mathrm{~N}$. The body initially has a velocity of $4 \mathrm{~ms}^{-1}$ in the positive $x$ direction. Sometime later the body has a velocity of $6 \mathrm{~ms}^{-1}$ in the positive $y$ direction. The work done on the body by the 5 $\mathbf{N}$ force during this time is

1 $20 \mathrm{~J}$
2 $40 \mathrm{~J}$
3 $52 \mathrm{~J}$
4 $72 \mathrm{~J}$
AMU-2018
Work, Energy and Power

148798 If a machine perform $4000 \mathrm{~J}$ output work and $1000 \mathrm{~J}$ is inside loss due to friction, then find the efficiency?

1 $80 \%$
2 $30 \%$
3 $25 \%$
4 $60 \%$
JIPMER-2018
Work, Energy and Power

148799 If the efficiency of an engine is $50 \%$ and its work output is $500 \mathrm{~J}$, then find input.

1 $1000 \mathrm{~J}$
2 $500 \mathrm{~J}$
3 $100 \mathrm{~J}$
4 $250 \mathrm{~J}$
JIPMER-2018