Home
Class 12
PHYSICS
A particle is moving in a circle of radi...

A particle is moving in a circle of radius `r` with speed `v` as shown in the figure. The magnitude of change in velocity in moving from `P` to `Q` is

A

2v `cos 40^(@)`

B

`2v sin 40^(@)`

C

`2v cos 20^(@)`

D

`2 v sin 20^(@)`

Text Solution

Verified by Experts

The correct Answer is:
D
`|Deltavecv|=2v sin (theta)/(2)=2v sin (40)/(2)=2v sin 20^(@)`
Promotional Banner

Topper's Solved these Questions

  • MOTION IN A PALNE

    ALLEN|Exercise EXERCISE-3|41 Videos

  • MOTION IN A PALNE

    ALLEN|Exercise SOLVED EXAMPLE|28 Videos

  • MOTION IN A PALNE

    ALLEN|Exercise EXERCISE-1|99 Videos

  • KINEMATICS-2D

    ALLEN|Exercise Exercise (O-2)|48 Videos

  • NEWTON'S LAWS OF MOTION & FRICTION

    ALLEN|Exercise EXERCISE (JA)|4 Videos

Similar Questions

Explore conceptually related problems

A particle is moving in a circle of radius r having centre at O with a constant speed v . The magnitude of change in velocity in moving from A to B is

A particle is moving in a circle of radius having centre at 0. with a constant speed V. The magnitude at change in velocity in moving from A to B is 60°

A particle is moving in a circle of radius r centred at O with constant speed v . What is the change in velocity in moving from A "to" B (/_ AOB = 40^@) ?

In Fig. a particle is moving in a circle of radius r centred at O with constant speed v. what is the change in velocity in moving from A to B ? Given /_AOB = 40^(@) .

A particle is moving in a circle or radius r centred at O with constant speed v. The change in velocity in moving from P to Q (angle POQ=40^(@)) is :

A particle is moving with constant speed v in xy plane as shown in figure. The magnitude of its angular velocity about point O is

A particle is moving an a cirle of radius 'r' and centre O with constant speed . What is the change in velocity in moving from A to B ? (If any angle between two velocity vector is theta .)

If a charge q is moving in a circle of radius r with speed v, then the equivalent current will be :

A particle is moving on a circular path of radius r with uniform velocity v. The change in velocity when the particle moves from P to Q is (anglePOQ=40^@ )

A block of mass m is moving in a circle of radius R with speed v inside a smooth cone as shown in figure. Choose the wrong options

ALLEN-MOTION IN A PALNE-EXERCISE-2
  1. Engine of a train that is moving with unifrom acceleration passes a po...

    Text Solution

    |

  2. An object is projected upwards with a velocity of 100m//s. It will str...

    Text Solution

    |

  3. A particle is moving in a circle of radius r with speed v as shown in ...

    Text Solution

    |

  4. A stone falls from a ballon that id descending at a uniform rate of 12...

    Text Solution

    |

  5. A man walks for some time 't' with velocity(v) due east. Then he walks...

    Text Solution

    |

  6. A particle is moving along a circular along a circular path of radius ...

    Text Solution

    |

  7. A drunkard is walking along a straight road. He takes five steps forwa...

    Text Solution

    |

  8. A stone is dropped from a height h. simultaneously, another stone is t...

    Text Solution

    |

  9. A body covered a distance of L m along a curved path of a quarter circ...

    Text Solution

    |

  10. A graph between the square of the velocity of a particle and the dista...

    Text Solution

    |

  11. Acceleration is defined as the rate of change of velocity. Suppose we ...

    Text Solution

    |

  12. Three particles P, Q and R are situated at point A on the circular p...

    Text Solution

    |

  13. A person walks up a stalled escalator in 90 s. When standingon the sam...

    Text Solution

    |

  14. A train accelerates from rest at a constant rate a for distance x(1) a...

    Text Solution

    |

  15. A car runs at constant speed on a circular track of radius 10m. taking...

    Text Solution

    |

  16. Position of a particle moving along x-axis is given by x=2+8t-4t^(2). ...

    Text Solution

    |

  17. A particle is thrown up vertically with a speed v(1) in air . If takes...

    Text Solution

    |

  18. A jet airplance travelling at the speed of 500 km ^(-1) ejects its pr...

    Text Solution

    |

  19. A particle of mass 3 kg moves under a froce of [4 hati + 8 hatj+ ...

    Text Solution

    |

  20. Figure shows the displacement of a particle going along the X-axis as ...

    Text Solution

    |