Home
Class 12
PHYSICS
A particle is projected with speed 'u' a...

A particle is projected with speed 'u' at an angle `60^@` with horizontal, then find the speed when its angle with horizontal changes to `30^@` .

A

`u/2`

B

`(usqrt3)/2`

C

`u/sqrt3`

D

`usqrt3`

Text Solution

Verified by Experts

The correct Answer is:
C
Horizontal component will not change `ucos 60^@ = v cos 30^@ `

`u(1/2)=v(sqrt3/2)`
`rArr v=u/sqrt3`
Promotional Banner

Topper's Solved these Questions

  • MAJOR TEST 8

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

  • NEET 2020 TEST 5

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

Similar Questions

Explore conceptually related problems

A projectile is projected with a speed u at an angle theta with the horizontal. What is the speed when its direction of motion makes an angle theta//2 with the horizontal

A particle is thrown with speed u of an angle theta with the horizontal when the particle makes an angle phi with the horizontal its speed changes to v

A particle is thrown with a speed u at an angle theta with the horizontal. When the particle makes an angle phi with the horizontal. Its speed changes to v :

A particle is projected with a speed u at an angle theta with the horizontal. What will be the speed of the particle when direction of motion of particle is at an angle alpha with the horizontal?

A particle is thrown with a speed 60 ms^(-1) at an angle 60^(@) to the horizontal. When the particle makes an angle 30^(@) with the horizontal in downward direction, it's speed at that instant is v. What is the value of v^(2) in SI units ?

A particle is projected with speed 10 m//s at angle 60^(@) with the horizontal. Then the time after which its speed becomes half of initial.

A ball is projected with velocity (u) at an anle alpha with horizontal plane. What is its speed when it makes an angle theta whith the horizontal plane ?

A particle is thrown with the speed u at an angle alpha with the horizontal. When the particle makes an angle beta the horizontal , its speed will be

A particle is projected with a speed u at an angle 60^(@) with the horizontal.What is the radius of curvature of the parabola traced out by the projectile at a point where the particle velocity makes an angle 30^(@) with the horizontal?

A projectile is projected with speed u at an angle of 60^@ with horizontal from the foot of an inclined plane. If the projectile hits the inclined plane horizontally, the range on inclined plane will be.

NEET MAJOR TEST (COACHING)-MAJOR TEST 9-PHYSICS
  1. Two uniform rods of equal length but different masses are rigidly join...

    Text Solution

    |

  2. A beam of light strikes a surface at angle of incidence of 60^(@) and...

    Text Solution

    |

  3. 64 drops of water are combined to form one big drop. Surface energy of...

    Text Solution

    |

  4. In an inductor of inductance L=100mH, a current of I=10A is flowing. T...

    Text Solution

    |

  5. A particle has a mass 400 times than that of the elctron and charge is...

    Text Solution

    |

  6. A 2 kg copper block is heated to 500^@C and then it is placed on a lar...

    Text Solution

    |

  7. Two ring of mass m and 2 m are connected with a massless spring and ca...

    Text Solution

    |

  8. Ratio between total intensity of magnetic field at equator to poles is

    Text Solution

    |

  9. Which is the corrective vision for shortsighted defect?

    Text Solution

    |

  10. In the circuit shown here, the readings of the ammeter and voltmeter a...

    Text Solution

    |

  11. At a given temperature, the pressure of an ideal gas of density rho is...

    Text Solution

    |

  12. When photons of energy hv fall on an aluminium plate (of work function...

    Text Solution

    |

  13. A beam contains 2 xx 10^(8) doubly charged positive ions per cubic cen...

    Text Solution

    |

  14. The temperature of ozone in a vessel, is raised by 1^(@)C at constant ...

    Text Solution

    |

  15. A body of mass 'm' is moving with constant speed v on a track shown in...

    Text Solution

    |

  16. underset1overset2int 3x^2dx=???

    Text Solution

    |

  17. Identify the operation performed by the circuit given below :-

    Text Solution

    |

  18. The fringe width in Young's double slit experiment on a screen which i...

    Text Solution

    |

  19. If an alternating current is given by i = a sin (omegat) + b cos (omeg...

    Text Solution

    |

  20. A particle is projected with speed 'u' at an angle 60^@ with horizonta...

    Text Solution

    |