Home
Class 11
PHYSICS
Average torque on a projectile of mass m...

Average torque on a projectile of mass `m` (initial speed `u` and angle of projection `theta`) between initial and final positions `P` and `Q` as shown in figure, about the point of projection is :
.

A

`(m u^(2)sin 2 theta)/2`

B

`m u^(2)cos theta`

C

`m u^(2) sin theta`

D

`(m u^(2)cos theta)/2`

Text Solution

Verified by Experts

The correct Answer is:
A
`tau=`Force`xx`perpendicular distance about point of projection
Promotional Banner

Topper's Solved these Questions

  • SYSTEM OF PARTICLES

    NARAYNA|Exercise Level-III|66 Videos

  • SYSTEM OF PARTICLES

    NARAYNA|Exercise NCERT based questions|15 Videos

  • SYSTEM OF PARTICLES

    NARAYNA|Exercise Level-1(C.W.)|64 Videos

  • PHYSICAL WORLD

    NARAYNA|Exercise C.U.Q|10 Videos

  • SYSTEM OF PARTICLES AND ROTATIONAL MOTION

    NARAYNA|Exercise EXERCISE - IV|39 Videos

Similar Questions

Explore conceptually related problems

A stone is projected with speed u and angle of projection is theta . Find radius of curvature at t=0.

If a projectile has a constant initial speed and angle of projection, find the relation between the chages in the horizontal range due to change in accelertion due to grvity.

A particle of mass m is projected with a speed v_(0) at an angle of projection theta with horizontal. Find the torque of the weight of the particle about the point of projection after time (v_(0)sintheta)/(g)

The speed of a projectile at its maximum height is half of its initial speed. The angle of projection is .

A particle of mass m is thrown with speed u at an angle of projection theta with horizontal. The average power imparted by the gravitational force until it strikes the ground is

A particle of mass m is projected with an initial velocity U at an angle theta to the horizontal. The torque of gravity on projectile at maximum height about the point of projection is

Two particles A and B are projected in same vertical plane as shown in figure.Their initial positions (t=0) , initial spped and angle of projections are indicated in the diagram.If initial angle of projection theta_(B)=37^(@) , what should be initial speed of projection of particle B , so that it hits particle A . U_(A)=60m//s

A particle of mass m is projected with a speed u at an angle theta with the horizontal. Find angular momentum of particle after time t about point of projection.

A particle of mass m is projected from the ground with an initial speed u at an angle alpha . Find the magnitude of its angular momentum at the highest point of its trajector about the point of projection.

A projectile thrown with an initial speed u and the angle of projection 15^@ to the horizontal has a range R . If the same projectile is thrown at an angle of 45^@ to the horizontal with speed 2 u , what will be its range ?

NARAYNA-SYSTEM OF PARTICLES-Level-II(C.W.)
  1. A circular disc is rotating about its own axis at constant angular acc...

    Text Solution

    |

  2. A circular disc is rotating about its own axis at a uniform angular ve...

    Text Solution

    |

  3. Average torque on a projectile of mass m (initial speed u and angle of...

    Text Solution

    |

  4. A metal rod of uniform thickness and of length 1m is suspended at its ...

    Text Solution

    |

  5. A metallic rod of mass 20kg and of uniform thickness rests against a w...

    Text Solution

    |

  6. A roller of mass 300kg and of radius 50cm lying on horizontal floor is...

    Text Solution

    |

  7. A thin rod of mass M and length L is bent into a circular ring. The ex...

    Text Solution

    |

  8. Two identical circular plates each of mass 0.1 kg and radius 10cm are ...

    Text Solution

    |

  9. A wheel starting from rest is uniformly accelerate at 4rad/s^2 for 10 ...

    Text Solution

    |

  10. Two spheres each of mass M and radius R//2 are connected at their cent...

    Text Solution

    |

  11. Moment of inertia of a thin circular plate of mass M, radius R about a...

    Text Solution

    |

  12. The mass of a thin circular plate is M and its radius is R. About an a...

    Text Solution

    |

  13. In a rectangle ABCD (BC = 2AB). The moment of inertia is maximum along...

    Text Solution

    |

  14. M is mass and R is radius of a circular ring. The moment of inertia of...

    Text Solution

    |

  15. I is moment of inertia of a thin circular plate about its natural axis...

    Text Solution

    |

  16. The moment of inertia of a uniform rod of length 2l and mass m about a...

    Text Solution

    |

  17. The ratio of radii of two solid spheres of same material is 1:2. The r...

    Text Solution

    |

  18. I is moment of inertia of a thin circular ring about an axis perpendic...

    Text Solution

    |

  19. A metallic thin wire has uniform thickness. From this wire, two circul...

    Text Solution

    |

  20. A uniform cylinder has radius R and length L. If the moment of inertia...

    Text Solution

    |