Home
Class 11
PHYSICS
A ball is dropped from a highly raised p...

A ball is dropped from a highly raised platform at `t=0` starting from rest. After 6 second another ball is thrown downwards from the same platform with a speed v. The two balls meet at `t=18 s.` What is the value of v? (Take `g=10 m/s^2`)

A

75 m/s

B

55 m/s

C

40 m/s

D

60 m/s

Text Solution

Verified by Experts

Promotional Banner

Topper's Solved these Questions

  • MEASUREMENTS

    TARGET PUBLICATION|Exercise EVALUATION TEST|17 Videos

  • OPTICS

    TARGET PUBLICATION|Exercise EXERCISE|447 Videos

Similar Questions

Explore conceptually related problems

A stone is dropped from the top of a tower of height 45 m. One second later another stone is thrown down from the town of the same tower. Both stones reach the ground at the same time. If (g= 10 m/s^2), magnitude of the initial velocity of the sound stone is

Ball-1 is dropped from the top of a building from rest. At the same moment, ball-2 is thrown upward towards ball-1 with speed 14 m/s from a point 21 m below the top of building How far will the ball-1 have dropped when it passes ball-2. (Assume g=10 m/s^2 )

A body A moves with a uniform acceleration a and zero initial velocity. Another body B starts from the same point, moves in the same direction with a constant velocity v. The two bodies meet after a time t. The value of t is

A stone is thrown vertically upwards from the ground with a velocity 15 m/s. At the same instant a ball is dropped from a point directly above the stone from a height of 30 m. At what height from the ground will the stone and the ball meet and after how much time? (Use g= 10 m//s^2 for ease of calculation).

The ceiling of a tunnel is 5 m high. What is the maximum horizontal distance that a ball thrown with a speed of 20 m/s, can go without hitting the ceiling of the tunnel? ( g=10 m/s^2 )

A ball is thrown vertically downwards from a height of 20m with an intial velocity v_(0) . It collides with the ground, loses 50% of its energy in collision and rebounds to the same height. The intial velocity v_(0) is (Take, g =10 ms^(-2) )

A solid sphere of mass 2 kg is resting inside a cube as shown in the figure. The cube is moving with a velocity v=(5t hati+2thatj)"m"//"s". Here t is the time in second. All surface are smooth. The sphere is at rest with respect to the cube. What is the total force exerted by the sphere on the cube? (Take g=10" m"//"s"^(2) )

A ball weighing 10g hits a hard surface vertically with a speed of 5m/s and rebounds with the same speed. The ball remains in contact with the surface for 0.01s. The average force exerted by the surface on the ball is

A ball is thrown vertically down from height of 40 m from the ground with an initial velocity 'v'. The ball hits the ground, loses (1)/(3)rt of its total mechanical energy and rebounds back to the same height. If the acceleration due to gravity is 10 "ms"^(-2) , the value of 'v' is

TARGET PUBLICATION-Motion in a plane-Exercise
  1. A lift is going up. The variation in the speed of the litt is as given...

    Text Solution

    |

  2. A stone is shot straight upward with a speed of 20 m/s from a tower 20...

    Text Solution

    |

  3. A ball is dropped from a highly raised platform at t=0 starting from r...

    Text Solution

    |

  4. A balloon is rising vertically up with a velocity of 29 m s^-1. A ston...

    Text Solution

    |

  5. The relative velocity of two objects moving with same speed and in the...

    Text Solution

    |

  6. Assertion: For a observer looking out through the window of a fast mov...

    Text Solution

    |

  7. A swimmer's speed in the direction of flow of river is 16 km/h. Agains...

    Text Solution

    |

  8. A police jeep is chasing a thief with velocity of 45 km/h. The thief i...

    Text Solution

    |

  9. A train A which is 120 m long is running with velocity 20 m/s while tr...

    Text Solution

    |

  10. A 150 m long trains travelling from east to west at a speed of 20 m/s....

    Text Solution

    |

  11. If vx, and vy, are the magnitudes of component of instantaneous veloci...

    Text Solution

    |

  12. Position of a particle at any instant t is given by vec r=3t hat i + 2...

    Text Solution

    |

  13. A particle starts from the origin with velocity vec u= (2hat i - 4 ha...

    Text Solution

    |

  14. A boat is moving with velocity of 3 hat i+ 4hat j in river and water i...

    Text Solution

    |

  15. A train is moving towards cast and a car is moving along north, both w...

    Text Solution

    |

  16. The speed of boat is 5 km/hr in still water. It crosses a river of wid...

    Text Solution

    |

  17. A particle is moving with velocity 5 m/s towards east and its velocity...

    Text Solution

    |

  18. A scooter going towards east at 10 m s^-1 turns right through an angle...

    Text Solution

    |

  19. A river is flowing from west to eat at a speed of 4 m/min. In what dir...

    Text Solution

    |

  20. A river is flowing from W to E with a speed of 5 m/min. A man can swim...

    Text Solution

    |