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An object of mass 1kg travelling in a straight line with a vel
Science
Science

Class 9

NCERT

Publisher:
NCERT
Subject:
Science
1

Chapter 1: Matter in Our Surroundings

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2

Chapter 2: Is Matter Around Us Pure?

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3

Chapter 3: Atoms and Molecules

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4

Chapter 4: Structure of the Atom

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5

Chapter 5: The Fundamental Unit of Life

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6

Chapter 6: Tissues

15 questions

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7

Chapter 7: Diversity in Living Organisms

6 questions

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8

Chapter 8: Motion

18 questions

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9

Chapter 9: Force and Laws of Motion

29 questions

Q1
A bullet of mass travelling horizontally with a velocity of strikes a stationary wooden block and comes to rest in . Calculate the distance of penetration of the bullet into the block. Also calculate the magnitude of the force exerted by the wooden block on the bullet.
Q2
An object of mass kg travelling in a straight line with a velocity of m collides with and sticks to a stationary wooden block of mass kg. Then they both move off together in the same straight line. Calculate the total momentum just before the impact and just after the impact. Also, calculate the velocity of the combined object.
Q3
An object of mass  is accelerated uniformly from a velocity of to in . Calculate the initial and final momentum of the object. Also, find the magnitude of the force exerted on the object.
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10

Chapter 10: Work and Energy

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11

Chapter 11: Sound

25 questions

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12

Chapter 12: Why do We Fall Ill?

6 questions

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13

Chapter 13: Natural Resourses

6 questions

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14

Chapter 14: Improvement in Food Resources

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15

Chapter 15: Gravitation

29 questions

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Question
Hard
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Solving time: 4 mins

An object of mass kg travelling in a straight line with a velocity of m collides with and sticks to a stationary wooden block of mass kg. Then they both move off together in the same straight line. Calculate the total momentum just before the impact and just after the impact. Also, calculate the velocity of the combined object.

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Updated on: Aug 22, 2023

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Science (NCERT)

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An object of mass kg travelling in a straight line with a velocity of m collides with and sticks to a stationary wooden block of mass kg. Then they both move off together in the same straight line. Calculate the total momentum just before the impact and just after the impact. Also, calculate the velocity of the combined object.
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Given :                                          
Momentum of the system just before collision,
Mass of the combined object,
Let velocity of combined object be
According to conservation of momentum, momentum of the system just after the collision,

or,        
or,
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A bullet of mass travelling horizontally with a velocity of strikes a stationary wooden block and comes to rest in . Calculate the distance of penetration of the bullet into the block. Also calculate the magnitude of the force exerted by the wooden block on the bullet.
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Question Text
An object of mass kg travelling in a straight line with a velocity of m collides with and sticks to a stationary wooden block of mass kg. Then they both move off together in the same straight line. Calculate the total momentum just before the impact and just after the impact. Also, calculate the velocity of the combined object.
Updated OnAug 22, 2023
TopicForce and Laws of Motion
SubjectScience
ClassClass 9
Answer TypeText solution:1 Video solution: 2
Upvotes164
Avg. Video Duration12 min