If a machine gun fires n bullets per second each with kinetic energy K then the power of the machine gun is

EASY

TS EAMCET

IMPORTANT

Comprehensive Guide to TS EAMCET Physics. Other applicable Exams - JEE Main, VITEEE, SRM JEE, MHT-CET, K-CET, BITSAT, AMU & Other State Engg. Entrance Exams>Chapter 2 - Work, Energy and Power>Exercise 2>Q 22

A crane is used to lift

1000 kg

of coal from a mine

100 m

deep. The time taken by the crane is

1

hour. The efficiency of the crane is

80 %

. If

g = 10 m s^{- 2}

, then the power of the crane is

EASY

TS EAMCET

IMPORTANT

Comprehensive Guide to TS EAMCET Physics. Other applicable Exams - JEE Main, VITEEE, SRM JEE, MHT-CET, K-CET, BITSAT, AMU & Other State Engg. Entrance Exams>Chapter 2 - Work, Energy and Power>Exercise 2>Q 23

Johnny and his sister Jane race up a hill. Johnny weighs twice as much as Jane and takes twice the time as long as Jane to reach the top. Compared to Jane:

EASY

TS EAMCET

IMPORTANT

Comprehensive Guide to TS EAMCET Physics. Other applicable Exams - JEE Main, VITEEE, SRM JEE, MHT-CET, K-CET, BITSAT, AMU & Other State Engg. Entrance Exams>Chapter 2 - Work, Energy and Power>Exercise 2>Q 24

A bomb at rest explodes into

3

parts of the same mass. The momentum of the

2

parts is

- 2 p \hat{i}

and

p \hat{j}

. The momentum of the third part will have a magnitude of

EASY

TS EAMCET

IMPORTANT

Comprehensive Guide to TS EAMCET Physics. Other applicable Exams - JEE Main, VITEEE, SRM JEE, MHT-CET, K-CET, BITSAT, AMU & Other State Engg. Entrance Exams>Chapter 2 - Work, Energy and Power>Exercise 2>Q 25

A bullet of mass

20 g

and moving with

600 m s^{- 1}

collides with a block of mass

4 kg

hanging with the string. What is velocity of bullet when it comes out of block, if block rises to height

0.2 m

after collision?

MEDIUM

TS EAMCET

IMPORTANT

Comprehensive Guide to TS EAMCET Physics. Other applicable Exams - JEE Main, VITEEE, SRM JEE, MHT-CET, K-CET, BITSAT, AMU & Other State Engg. Entrance Exams>Chapter 2 - Work, Energy and Power>Exercise 2>Q 26

In the figure shown, a particle of mass $m$ is released from the position $A$ on a smooth track. When the particle reaches at $B$ , then normal reaction on it by the track is

Question Image

EASY

TS EAMCET

IMPORTANT

Comprehensive Guide to TS EAMCET Physics. Other applicable Exams - JEE Main, VITEEE, SRM JEE, MHT-CET, K-CET, BITSAT, AMU & Other State Engg. Entrance Exams>Chapter 2 - Work, Energy and Power>Exercise 2>Q 27

A block of mass $M$ is kept on a platform which is accelerated upward with a constant acceleration $a$ during the time interval $T$ . The work done by normal reaction between the block and platform is

Question Image

EASY

TS EAMCET

IMPORTANT

Comprehensive Guide to TS EAMCET Physics. Other applicable Exams - JEE Main, VITEEE, SRM JEE, MHT-CET, K-CET, BITSAT, AMU & Other State Engg. Entrance Exams>Chapter 2 - Work, Energy and Power>Exercise 2>Q 28

A metal ball of mass

2 kg

moving with a velocity of

36 km h^{- 1}

has a head on collision with a stationary ball of mass

3 kg

. If after the collision, the two balls move together, the loss in kinetic energy due to collision is

EASY

TS EAMCET

IMPORTANT

Comprehensive Guide to TS EAMCET Physics. Other applicable Exams - JEE Main, VITEEE, SRM JEE, MHT-CET, K-CET, BITSAT, AMU & Other State Engg. Entrance Exams>Chapter 2 - Work, Energy and Power>Exercise 2>Q 29

A body is dropped from a height of

20 m

and rebounds to a height

10 m

. The loss of energy is

If a machine gun fires $n$ bullets per second each with kinetic energy $K$ , then the power of the machine gun is

Important Questions on Work, Energy and Power

Learn and Prepare for any exam you want !

If a machine gun fires n bullets per second each with kinetic energy K, then the power of the machine gun is

Important Questions on Work, Energy and Power

Learn and Prepare for any exam you want !

If a machine gun fires $n$ bullets per second each with kinetic energy $K$ , then the power of the machine gun is