Home
Class 11
PHYSICS
A ball moving vertically downward with a...

A ball moving vertically downward with a speed of `10 m//s` collides with a platform. The platform moves with a velocity of `5 m//s` in downward direction. If `e = 0.8`, find the speed (in `m//s` ) of the ball just after collision.

Text Solution

Verified by Experts

The correct Answer is:
`1 m//s`

By definition of `e : e = (v_(2) - v_(1))/(u_(1) - u_(2))`, we have `0.8 = ( V + 5)/(10 - 5) rArr v = 1 m//s`
Promotional Banner

Topper's Solved these Questions

  • CENTRE OF MASS

    ALLEN |Exercise EXERCISE-I|40 Videos

  • CENTRE OF MASS

    ALLEN |Exercise EXERCISE-II|43 Videos

  • BASIC MATHEMATICS USED IN PHYSICS &VECTORS

    ALLEN |Exercise EXERCISE-IV ASSERTION & REASON|11 Videos

  • ELASTICITY, SURFACE TENSION AND FLUID MECHANICS

    ALLEN |Exercise Exercise 5 B (Integer Type Questions)|3 Videos

Similar Questions

Explore conceptually related problems

A vehicle moving with a speed of 18 kmh^(-1) covers……….m in 1 s.

Rain is falling vertically downwards with a velocity of 2m//s. A person is runing to the North with a velocity of 2sqrt(3) m/s. Find out the velocity and direction of rain as appeared to the person.

A small ball falling vertically downward with constant velocity 4m//s strikes elastically a massive inclined cart moving with velocity 4m//s horizontally as shown. The velocity of the rebound of the ball is

A particle of mass m moving with velocity v is collide with a stationary particle of mass 2 m . The speed of the system , after collision will be ……….

A mass 'm' moves with a velocity 'v' and collides inelastieally with another identical mass . After collision the 1^(st) mass moves with velocity v/sqrt3 in a direction perpendicular to the initial direction of motion. Find the speed of the 2^(nd) mass after collision. undersetunderset ((before),(collision))(m)(*rarr) underset(m)* uparrow v//sqrt3 underset((after),(collision):)

A ball of mass 2kg moving with speed 5m/s collides directly with another ball of mass 3kg moving in the same direction with speed 4m/s. The coefficient os restitution is 2/3. Find the velocities of both ball after the collision.

A ball is projected vertically up wards with a velocity of 100 m/s. Find the speed of the ball at half the maximum height. (g=10 m//s^(2))

If a ball is thrown vertically upwards with a velocity of 40m//s , then velocity of the ball after 2s will be (g = 10m//s^(2))

A ball moving with a velocity of 12ms^(-1) collides with another identical stationary ball . After the collision they move as shown in figure . Find the speed of the balls after the collision . Also , decide whether the condition is elastic or not .

A ball of mass 1 kg drops vertically on to the floor wit a speed of 25 m//s . It rebounds with an initial velocity of 10 m//s . What impulse acts on the ball during contact ?

ALLEN -CENTRE OF MASS-EXERCISE-V B
  1. A ball moving vertically downward with a speed of 10 m//s collides wit...

    Text Solution

    |

  2. Two particles of masses m(1) and m(2) in projectile motion have veloci...

    Text Solution

    |

  3. Two blocks of masses 10 kg and 4 kg are connected by a spring of negli...

    Text Solution

    |

  4. If components of the momentum of a body along x and y-axis are p(x)=2 ...

    Text Solution

    |

  5. Two small particles of equal masses stant moving in opposite directio...

    Text Solution

    |

  6. Look at the drawing given in the figure which has been drawn with ink ...

    Text Solution

    |

  7. A particle of mass m is projected from the ground with an initial spee...

    Text Solution

    |

  8. A tennis ball dropped on a barizoontal smooth surface , it because bac...

    Text Solution

    |

  9. Two balls , having linear momenta vec(p)(1) = p hat(i) and vec(p)(2) =...

    Text Solution

    |

  10. STATEMENT-l : In an elastic collision between two bodies, the relative...

    Text Solution

    |

  11. Satement-1: if there is no external torque on a body about its centre ...

    Text Solution

    |

  12. A small block of mass M move on a frictionless surface of an inclimed...

    Text Solution

    |

  13. A small block of mass M move on a frictionless surface of an inclimed...

    Text Solution

    |

  14. A small block of mass M move on a frictionless surface of an inclimed...

    Text Solution

    |

  15. Two blocks of masses 2kg and M are at rest on an inclined plane and ar...

    Text Solution

    |

  16. A car P is moving with a uniform speed 5sqrt3 m//s towards a carriage ...

    Text Solution

    |

  17. A particle of mass m, moving in a cicular path of radius R with a cons...

    Text Solution

    |

  18. Two point masses m1 and m2 are connected by a spring of natural length...

    Text Solution

    |

  19. A rectangular plate of mass M and dimension axxb is held in horizonta...

    Text Solution

    |

  20. Three objects A , B and C are kept in a straight line on a smooth hori...

    Text Solution

    |