Home
Class 11
PHYSICS
The velocity of a bullet is reduced from...

The velocity of a bullet is reduced from `200 m//s` to `100 m//s` while travelling through a wooden block of thickness `10 cm`. The retardation, assuming it to be uniform, will be.

A

`10 xx 10^4 m//s^2`

B

`12 xx 10^4 m//s^2`

C

`13.5 xx 10^4 m//s^2`

D

`15 xx 10^4 m//s^2`

Text Solution

Verified by Experts

The correct Answer is:
D
Acceleration or ratardation ` = (v^2 - u^2)/(2s) = ((100)^2 - (200)^2)/(2xx0.1)`
`rArr a= 1.5 xx 10^5 m//s^2 = 15 xx 10^4 m//s^2`
Promotional Banner

Topper's Solved these Questions

  • MOTION IN ONE DIMENSION

    ERRORLESS|Exercise ASSERTION AND REASON|24 Videos

  • MOTION IN ONE DIMENSION

    ERRORLESS|Exercise NCERT BASED QUESTIONS (MOTION UNDER GRAVITY )|56 Videos

  • KINETIC THEORY OF GASES

    ERRORLESS|Exercise ASSERTION AND REASON |16 Videos

  • MOTION IN TWO DIMENSION

    ERRORLESS|Exercise ASSERTION & REASON|19 Videos

Similar Questions

Explore conceptually related problems

(a) If a train traveling at 72 km//h is to be brought to rest in a distance of 200 m , find the deceleration. (b) The velocity of a bullet is reduced from 200 m//s to 100 m//s while traveling through a wooden block of thickness 10 cm . Find the retardation (assuming it ti be uniform).

The velocity of a bullet is reduce from 200 m//s to 100m//s while travelling through a wodden block of thickness 10 cm Assuming it to be uniform, the retardation will be

The velocity of a bullet is reduced from 400 ms^(-1) to 100 ms^(-1) while travelling thought material of thickness of 1 m. The retardation will be

On observing a sign board about speed limit,a driver applies brakes and reduces his speed from 100m/s to 50m/s though a distance of 50m .The uniform retardation provided by the brakes (in m/ s^(2) ) will be ?

A bullet moving with an initial velocity of 20 m s^(-1) , strikes a target and comes to rest after penetrating the target to a distance of 10 cm. Calculate the retardation caused by the target.

A bullet of mass 10gm moving with a horizontal velocity 100m//s passes through a wooden block of mass 100gm . The block is resting on a smooth horizontal floor. After passing through the block the velocity of the bullet is 10m//s the velocity of the emerging bullet with respect to the block is .

If a bullet of mass 5gm moving with velocity 100m//sec, penertates the wooden block upto 6cm. Then the average force imposed by the bullet on the block is

A bullet of mass m moving with velocity v strikes a suspended wooden block of mass M . If the block rises to a height h , the initial velocity of the block will be (

A 4.00g bullet travelling horizontally with a velocity of magnitude 500m//s is fired into a wooden block with a mass of 1.00kg , initially at rest on a level surface. The bullet passes through the block and emerges with speed 100m//s . The block slides a distance of 0.30m along the surface from its initial position. (a) What is the coefficient of kinetic friction between block and surface? (b) What is the decrease in kinetic energy of the bullet? (c) What is the kinetic energy of the block at the instant after the bullet has passed through it? Neglect friction during collision of bullet with the block.

ERRORLESS-MOTION IN ONE DIMENSION-PAST YEARS QUESTIONS
  1. Preeti reached the metro station and found that the escalator was not ...

    Text Solution

    |

  2. A car moving with a speed of 40 km//h can be stopped by applying the b...

    Text Solution

    |

  3. The velocity of a bullet is reduced from 200 m//s to 100 m//s while tr...

    Text Solution

    |

  4. A body A starts from rest with an acceleration a1. After 2 seconds, an...

    Text Solution

    |

  5. A particle starts from rest, accelerates at 2(m)/(s^2) for 10 s and th...

    Text Solution

    |

  6. A car, starting from rest, accelerates at the rate f through a distanc...

    Text Solution

    |

  7. A balloon rises from rest on the ground with constant acceleration g//...

    Text Solution

    |

  8. A parachutist after bailing out falls 50m without friction. When parac...

    Text Solution

    |

  9. Which of the following velocity-time graphs shows a realistic situatio...

    Text Solution

    |

  10. Velocity-time curve for a body projected vertically upwards is

    Text Solution

    |

  11. If the velocity of a particle is v = At + Bt^2, where A and B are cons...

    Text Solution

    |

  12. .An object is moving with a uniform acceleration which is parallel to ...

    Text Solution

    |

  13. Two cars P and Q start from a point at the same time in a straight lin...

    Text Solution

    |

  14. The speed of a swimmer in still water is 20 m//s. The speed of river w...

    Text Solution

    |

  15. When a ball is thrown up vertically with velocity v0, it reaches a max...

    Text Solution

    |

  16. Two spheres of same size, one of mass 2 kg and another of mass 4 kg, a...

    Text Solution

    |

  17. Velocity of a body reaching the point from which it was projected upwa...

    Text Solution

    |

  18. Three different objects of masses m(1) , m(2) and m(2) are allowed to ...

    Text Solution

    |

  19. From the top of a tower, a particle is thrown vertically downwards wit...

    Text Solution

    |

  20. The time taken by a block of wood (initially at rest) to slide down a ...

    Text Solution

    |