Home
Class 11
PHYSICS
A point size mass 100 gm is rotated in a...

A point size mass `100 gm` is rotated in a vertical circle using a cord of length `20 cm`. When the string makes an angle `60^@` with the vertical, the speed of the mass is `1.5 m//s`. The tangential acceleration of the mass in that position is (in `ms^(-2)`).

A

`4.9`

B

`4.9 sqrt(2)`

C

`4.9 sqrt(3)`

D

`9.8`

Text Solution

Verified by Experts

The correct Answer is:
C
`a_(t) = g sin theta`.
Promotional Banner

Topper's Solved these Questions

  • WORK POWER AND ENERGY

    NARAYNA|Exercise Level- III (C.W)|50 Videos

  • WORK POWER AND ENERGY

    NARAYNA|Exercise NCERT (Based Questions)|45 Videos

  • WORK POWER AND ENERGY

    NARAYNA|Exercise Level- I (C.W)|60 Videos

  • WORK , ENERGY & POWER

    NARAYNA|Exercise EXERCISE IV|43 Videos

Similar Questions

Explore conceptually related problems

A bob of mass 1 kg is suspended from an inextensible string of length 1 m. When the string makes an angle 60^(@) with vertical, speed of the bob is 4 m/s Net acceleration of the bob at this instant is

A particle of mass 200 g , is whirled into a vertical circle of radius 80 cm uisig a massless string The speed of the particle when the string makes an angle of 60^(@) with the vertical line is 1.5ms^(-1). The tension in the string at this position is

A particle of mass 20 g is whirled into a vertical circle of radius 80cm using a massless string The speed of the particle when the string makes an angle 60^(@) with the verticle line is 1.5ms^(-1) What is the tension in the string in this position ?

A bob of mass 1 kg is suspended from an inextensible string of length 1 m. When the string makes an angle 60^(@) with vertical, speed of the bob is 4 m/s Upto what maximum height will the bob rise with respect to the bottommost point ?

A body of mass 4 kg is moved in a vertical circle with sufficient speed .Its tangential acceleration , when the string makes an angle of 30^(@) with the verticle downward is (g=10 mm/s^(2))

A stone of mass 2kg whirled in a horizontal circle attached at the end of 1.5 m long string. If the string makes an angle of 30 ^@ with vertical, compute its period ( g = 9.8 m//s ^ 2 ) .

The bob of a 0.2 m pendulum describes an arc of circle in a vertical plane. If the tension in the cord is sqrt3 times the weight of the bob when the cord makes an angle 30^(@) with the vertical, the acceleration of the bob in that position is

A small body of mass m = 0.1 kg swings in a vertical circle at the end of a chord of length 1 m. Its speed is 2 m/s when the chord makes an angle theta = 30^(@) with the vertical. Find the tension in the chord.

A small stone of mass 50 g is rotated in a vertical circle of radius 40 cm. What is the minimum tension in the string at the lowest point?

NARAYNA-WORK POWER AND ENERGY-Level- II (C.W)
  1. A tank on the roof of a 20 m high building can hold 10 m^(3) of water....

    Text Solution

    |

  2. An electric fan, with effective area of cross-section 'A', accelerates...

    Text Solution

    |

  3. A point size mass 100 gm is rotated in a vertical circle using a cord ...

    Text Solution

    |

  4. A vehicle is travelling along concave road then along convex road of s...

    Text Solution

    |

  5. The length of a simple pendulum is 1 m. The bob is given a velocity 7 ...

    Text Solution

    |

  6. A body is allowed to slide down a frictionless track from rest positio...

    Text Solution

    |

  7. A body is mass m is rotating in a vertical circle of radius 'r' with c...

    Text Solution

    |

  8. A simple pendulum of length 'l' carries a bob of mass 'm'. If the brea...

    Text Solution

    |

  9. A body of mass 4kg moving with a speed of 3 ms^(-1) collides head on w...

    Text Solution

    |

  10. Three identical particles with velocities v0hati, -3v0hatj and 5v0hatk...

    Text Solution

    |

  11. From the top of a tower of height 100 m a 10 gm block is dropped freel...

    Text Solution

    |

  12. A steel ball of radius 2 cm is initially at rest. It is struck head on...

    Text Solution

    |

  13. A steel ball of radius 2 cm is initially at rest. It is struck head on...

    Text Solution

    |

  14. A tennis ball bounces down a flight of stairs, striking each step in t...

    Text Solution

    |

  15. A ball hits the ground and loses 20 % of its momentum. Coefficient of ...

    Text Solution

    |

  16. A plastic ball falling from a height 4.9 m rebounds number of times. I...

    Text Solution

    |

  17. A ball is dropped from a height 'h' on to a floor of coefficient of re...

    Text Solution

    |

  18. In two separate collisions, the coefficient of restitutions e(1) and e...

    Text Solution

    |

  19. A sphere of mass m moving with constant velocity u, collides with anot...

    Text Solution

    |

  20. A canon shell fired breaks into two equal parts at its highest point. ...

    Text Solution

    |