Home
Class 12
PHYSICS
The position (x) of body moving along x-...

The position (x) of body moving along x-axis at time (t) is given by `x=3f^(2)` where x is in matre and t is in second. If mass of body is 2 kg, then find the instantaneous power delivered to body by force acting on it at `t=4` s.

A

288W

B

280W

C

290W

D

260W

Text Solution

Verified by Experts

The correct Answer is:
A
`x=3t2" "v=(dx)/(dt)=61&a=(dv)/(dt)=6`
`P=F.v=m.av=2xxx6xx6t`
`P=72xx4=288W`
Promotional Banner

Topper's Solved these Questions

  • NEET-UG DRILL TEST 13

    NEET MAJOR TEST (COACHING)|Exercise PHYSICS|44 Videos

  • NEET-UG DRILL TEST 15

    NEET MAJOR TEST (COACHING)|Exercise PHYSICS|45 Videos

Similar Questions

Explore conceptually related problems

The position of the particle moving along x-axis is given by x=2t-3t^(2)+t^(3) where x is in mt and t is in second.The velocity of the particle at t=2sec is

The position of a body moving along x-axis at time t is given by x= (t^(2)-4t+6)m . The distance travelled by body in time interval t = 0 to t = 3 s is

The position x of a particle moving along x - axis at time (t) is given by the equation t=sqrtx+2 , where x is in metres and t in seconds. Find the work done by the force in first four seconds

The potential energy of body of mass 2 kg moving along the x-axis is given by U = 4x^2 , where x is in metre. Then the time period of body (in second) is

The velocity v of a body moving along a straight line varies with time t as v=2t^(2)e^(-t) , where v is in m/s and t is in second. The acceleration of body is zero at t =

The position of a Particle of Mass 4 g,acted upon by a constant force is given by x= 4t^(2) +t,where x is in metre and t in second .The work done during the first 2 seconds is

The position (x) of a particle of mass 2 kg moving along x-axis at time t is given by x=(2t^(3)) metre. Find the work done by force acting on it in time interval t=0 to t=2 is :-

The displacement of a particle moving along an x axis is given by x=18t+5.0t^(2) , where x is in meters and t is in seconds. Calculate (a) the instantaneous velocity at t=2.0s and (b) the average velocity between t=2.0s and t=3.0s .

At time t, the position of a body moving along the x - axis is x=t^3-6t^(2)+9tm The deceleration of the body at 1 s is

The position (x) of a particle of mass 1 kg moving along x-axis at time t is given by (x=(1)/(2)t^(2)) metre. Find the work done by force acting on it in time interval from t=0 to t=3 s.

NEET MAJOR TEST (COACHING)-NEET-UG DRILL TEST 14-PHYSICS
  1. A body weighs 72 N on the surface of the earth. What is the gravitatio...

    Text Solution

    |

  2. A body of mass m rises to a height h=R//5 from the earth's surface whe...

    Text Solution

    |

  3. If the radius of a planet is R and its density is rho , the escape vel...

    Text Solution

    |

  4. Speed of earth is maximum at :-

    Text Solution

    |

  5. Which of the following will not show deflection from the path on passi...

    Text Solution

    |

  6. The temperature of a rod of length 1 meter and area of cross-section 1...

    Text Solution

    |

  7. A Soild sphere falls with a terminal velocity of 10 cm/sec in the eart...

    Text Solution

    |

  8. figure shows two holes in a wide tank containing a liquid common. The ...

    Text Solution

    |

  9. If work done in increasing the size of a soap film from 10 cm x 6 cm t...

    Text Solution

    |

  10. A copper ball of radius r travels with a uniform speed v in a viscous ...

    Text Solution

    |

  11. Two unequal soap bubbles are formed one on each side of a tube closed ...

    Text Solution

    |

  12. A person draws water from a 5 m deep well in a bucket of mass 2 kg of ...

    Text Solution

    |

  13. The position (x) of body moving along x-axis at time (t) is given by ...

    Text Solution

    |

  14. A particle is moving in a vertical in a vertical circle . The t...

    Text Solution

    |

  15. A billiard ball moving with a speed of 5 m//s collides with an identic...

    Text Solution

    |

  16. Two thin uniform rings made of same material and of radii R and 4 R ar...

    Text Solution

    |

  17. A torque of 50 N-m acting on a wheel at rest rotates it through 200 ra...

    Text Solution

    |

  18. The angular velocity of a body is vec(omega)=2hati+3hatj+4hatk and a t...

    Text Solution

    |

  19. A ring of radius 0.5 m and mass 10 kg is rotating about its diameter w...

    Text Solution

    |

  20. The differene of pressure inside and outside of a soap bubble of radiu...

    Text Solution

    |