Home
Class 11
PHYSICS
A 1 kg mass at rest is subjected to an a...

A `1 kg` mass at rest is subjected to an acceleration of `5m//s^(2)` and travels `40 m`. The average power during the motion is

A

`40W`

B

`8W`

C

`50W`

D

`200 W`

Text Solution

Verified by Experts

The correct Answer is:
C
`P_("avg") = (W)/(t) = (FS)/(t) = (m a S)/(t)` , `v = sqrt(2 as), t = (v)/(a)`
Promotional Banner

Topper's Solved these Questions

  • COLLISION

    NARAYNA|Exercise Level-II (H.W)|54 Videos

  • COLLISION

    NARAYNA|Exercise Subjective type Questions|9 Videos

  • CIRCULAR MOTION

    NARAYNA|Exercise LEVEL II(H.W)|51 Videos

  • FRICTION

    NARAYNA|Exercise Passage type of questions I|6 Videos

Similar Questions

Explore conceptually related problems

A motorcycle moving with a speed of 5 m/s is subjected to an acceleration of 10 m s^(-2) . If the body starts from rest, how much distance will it cover in 2 s ?

The velocity-time graph of a particle moving along a straight line is shown is . The rate of acceleration and deceleration is constant and it is equal to 5 m s^(-2) . If the a average velocity during the motion is 20 m s^(-1) , Then . The value of t is.

If a bus travelling at 20 m/s is subjected to a steady deceleration of 5 m//s^(2) , how long will it take to come to rest ?

The velocity-time graph of a particle moving along a straight line is shown is Fing. The rate of acceleration and deceleration is constant and it is equal to 5 m s^(-2) . If the a average velocity during the motion is 20 m s^(-1) , Then . The distace travelled with uniform velcoty is .

A car of mass 1000 kg accelerates uniformly from rest to a velocity of 15 m/s in 5 sec. The average power of the engine during this period in watts is :

A body of mass 1kg is made to travel with a unitform acceleration of 30 cm//s^(2) over a distance of 2m , then work to be done is

An object undergoes an acceleration of 8 m//s^(2) starting from rest. Find the distance travelled in 1 second.

A truck starts from rest with an acceleration of 1.5 m//s^(2) car 150 m behind starts from rest with an acceleration of 2 m//s^(2) . How long will it take before both the truck and car side byside, and how much distance is traveled by each?

A body of mass m kg is ascending on a smooth inclined plane of inclination theta(sintheta=(1)/(x)) with constant acceleration of a m//s^(2). The final velocity of the body is v m//s^(2). The work done by the body during this motion is (Initial velocity of the body = 0)

NARAYNA-COLLISION-Level-I (H.W)
  1. An electric motor operates with an efficiency of 90%. A pump operated ...

    Text Solution

    |

  2. A machine gun fires 420 bullets per minute. The velocity of each bulle...

    Text Solution

    |

  3. A 1 kg mass at rest is subjected to an acceleration of 5m//s^(2) and t...

    Text Solution

    |

  4. If the power of the motor of a water pump is 3kW, then the volume of w...

    Text Solution

    |

  5. A particle moves with a velocity (5 hat(i)+3 hat(j)+6 hat(k)) m//s und...

    Text Solution

    |

  6. A body of mass m is rotated in a vertical circle of radius R by means ...

    Text Solution

    |

  7. A body of mass m is rotated in a vertical circle with help of light st...

    Text Solution

    |

  8. A vehicle is travelling with uniform speed along a concave road of rad...

    Text Solution

    |

  9. A car is travelling along a flyover bridge which is a part of vertical...

    Text Solution

    |

  10. A very small particle rests on the top of a hemisphere of radius 20 cm...

    Text Solution

    |

  11. A ball of 4 kg mass moving with a speed of 3ms^(-1) has a head on elas...

    Text Solution

    |

  12. A ping-pong ball strikes a wall with a velocity of 10 ms^(-1). If the ...

    Text Solution

    |

  13. Two identical balls collide head on. The initial velocity of one is 0....

    Text Solution

    |

  14. A truck of mass 15 tons moving with 1 ms^(-1) collides with a stationa...

    Text Solution

    |

  15. In the above problem the total KE before collision is

    Text Solution

    |

  16. In the above problem loss of KE during collision is

    Text Solution

    |

  17. A bullet of mass 'x' moves with a velocity y, hits a wooden block of m...

    Text Solution

    |

  18. A railway truck of mass 16000 kg moving with a velocity of 5ms^(-1) st...

    Text Solution

    |

  19. A ball falls from a height of 10m on to a horizontal plane. If the coe...

    Text Solution

    |

  20. A ball is dropped from a height of 3m. If coefficient of restitution b...

    Text Solution

    |