Home
Class 11
PHYSICS
A ball A is dropped from a building of ...

A ball ` A` is dropped from a building of height ` 45 m`. Simultaneously another ball ` B` is thrown up with a speed ` 40 m//s`. Calculate the relative speed of the balls as a function of time.

A

`20ms^(-1)`

B

`40ms^(-1)`

C

`30ms^(-1)`

D

`0ms^(-1)`

Text Solution

Verified by Experts

The correct Answer is:
D
Relative acceleration is zero as g is downwards for the both the bodies.
Promotional Banner

Topper's Solved these Questions

  • MOTION IN A STRAIGHT LINE

    NARAYNA|Exercise Level 2 C.W|25 Videos

  • MOTION IN A STRAIGHT LINE

    NARAYNA|Exercise Level 3 C.W|25 Videos

  • MOTION IN A STRAIGHT LINE

    NARAYNA|Exercise C.U.Q|42 Videos

  • MOTION IN A PLANE

    NARAYNA|Exercise Level-II(H.W)|31 Videos

  • NEWTONS LAWS OF MOTION

    NARAYNA|Exercise PASSAGE TYPE QUESTION|6 Videos

Similar Questions

Explore conceptually related problems

A ball is dropped from the top of a building of height 80 m. At same instant another ball is thrown upwards with speed 50 m/s from the bottom of the building. The time at which balls will meet is

A ball is dropped from a top of a 100 m high building. At the ssame time another ball is thrown up from the ground with a speed of 20ms^(-1) . At what time will the balls meet?

A ball is thrown up at a speed of 4.0 m/s. Find the maximum height reached by the ball. Take g=10 m//s^2 .

A ball is thrown downwards with a speed of 20 ms^(–1) from top of a building 150m high and simultaneously another ball is thrown vertically upwards with a speed of 30 ms^(–1) from the foot of the building. Find the time after which both the balls will meet - (g = 10 ms^(–2))

A ball is dropped from the top of a building 100 m high. At the same instant another ball is thrown upwards with a velocity of 40ms^(-1) form the bottom of the building. The two balls will meet after.

A ball is dropped from top of a tower of 100 m height. Simultaneously another ball was thrown upward from bottom of the tower with a speed of 50 m//s (g = 10m//s^(2)) . They will cross each other after

A ball is thrown vertically upward with a velocity of 20 m/s. Calculate the maximum height attain by the ball.

From the top of the tower of height 400 m , a ball is dropped by a man, simultaneously from the base of the tower, another ball is thrown up with a velocity 50 m//s . At what distance will they meet from the base of the tower ?

A ball is thrown upwards with a speed u from a height h above the ground.The time taken by the ball to hit the ground is

NARAYNA-MOTION IN A STRAIGHT LINE-Level 1 C.W
  1. A body is moving along the circumference of a circle of radius R and c...

    Text Solution

    |

  2. A body completes one round of a circle of radius R in 20 second. The d...

    Text Solution

    |

  3. If a body covers first half of its journey with uniform speed v(1) and...

    Text Solution

    |

  4. A car is moving along a straight (OP). It moves from O to P in 18 seco...

    Text Solution

    |

  5. For body moving with uniform acceleration a, initial and final velocit...

    Text Solution

    |

  6. A body moves with a velocity of 3 m//s due east and then turns due nor...

    Text Solution

    |

  7. If a body travles 30 m in an interval of 2 s and 50 m in the next inte...

    Text Solution

    |

  8. A bullet travelling horizontally looses 1//20^(th) of its velocity whi...

    Text Solution

    |

  9. If S(n)=2+0.4n find initial velocity and acceleration

    Text Solution

    |

  10. A particle starts moving from rest under uniform acceleration it trave...

    Text Solution

    |

  11. A particle is moving in a straight line with initial velocity u and un...

    Text Solution

    |

  12. A particle is moving with uniform acceleration along a straight line A...

    Text Solution

    |

  13. A car moving on a straight road accelerated from a speed of 4.1 m//s t...

    Text Solution

    |

  14. A body projected vertically upwards with a velocity of 19.6 m//s reach...

    Text Solution

    |

  15. A ball is thrown straight upward with a speed v from a point h meter a...

    Text Solution

    |

  16. A ball is dropped on the floor from a height of 10m. It rebounds to a ...

    Text Solution

    |

  17. A body freely falling from the rest has velocity v after it falls thro...

    Text Solution

    |

  18. A ball A is dropped from a building of height 45 m. Simultaneously a...

    Text Solution

    |

  19. Two cars 1 & 2 starting from rest are moving with speeds V(1) and V(2)...

    Text Solution

    |

  20. Two cars are travelling towards each other on a straight road at veloc...

    Text Solution

    |