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Force and Laws of Motion

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

Science

Class 9

NCERT

Chapter 1: Matter in Our Surroundings

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13 questions

Chapter 3: Atoms and Molecules

16 questions

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19 questions

Chapter 5: The Fundamental Unit of Life

10 questions

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15 questions

Chapter 7: Diversity in Living Organisms

6 questions

Chapter 8: Motion

18 questions

Chapter 9: Force and Laws of Motion

29 questions

A bullet of mass

10 g

travelling horizontally with a velocity of

150 m s^{- 1}

strikes a stationary wooden block and comes to rest in

0.03 s

. 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.

An object of mass

1

kg travelling in a straight line with a velocity of

10

s^{- 1}

collides with and sticks to a stationary wooden block of mass

5

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.

An object of mass

100 k g

is accelerated uniformly from a velocity of

5 m s^{- 1}

8 m s^{- 1}

6 s

. Calculate the initial and final momentum of the object. Also, find the magnitude of the force exerted on the object.

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Chapter 10: Work and Energy

23 questions

Chapter 11: Sound

25 questions

Chapter 12: Why do We Fall Ill?

6 questions

Chapter 13: Natural Resourses

6 questions

Chapter 14: Improvement in Food Resources

Chapter 15: Gravitation

29 questions

Question

Hard

Solving time: 4 mins

An object of mass $1$ kg travelling in a straight line with a velocity of $10$ m $s^{- 1}$ collides with and sticks to a stationary wooden block of mass $5$ 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.

Name: Video solution 1: [Solved] An object of mass 1kg travelling in a straight line with a velocity of 10m s−1 collides with and sticks to a stationary wooden block of mass 5kg. 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. - Science
Uploaded: 2023-02-06T14:21:47.000Z
Duration: 10 min
Description: Video solution 1: [Solved] An object of mass 1kg travelling in a straight line with a velocity of 10m s−1 collides with and sticks to a stationary wooden block of mass 5kg. 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. - Science

Views: 5,815 students

Updated on: Aug 22, 2023

Book:

Science (NCERT)

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Daniel Discussed

An object of mass

1

kg travelling in a straight line with a velocity of

10

s^{- 1}

collides with and sticks to a stationary wooden block of mass

5

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.

8 mins ago

Discuss this question LIVE

8 mins ago

Text solutionVerified

Given :

m_{1} = 1 k g

m_{2} = 5 k g

u_{1} = 10

m s^{- 1}

u_{2} = 0

Momentum of the system just before collision,

P_{i} = m_{1} u_{1} + m_{2} u_{2}

P_{i} = 1 \times 10 + 5 \times 0 = 10 k g m s^{- 1}

Mass of the combined object,

M = m_{1} + m_{2} = 6 k g

Let velocity of combined object be

v

According to conservation of momentum, momentum of the system just after the collision,

P_{f} = P_{i}

⟹ P_{f} = 10 k g m s^{- 1}

M v = 10

or,

6 \times v = 10

or,

v = 1.67 m / s

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Practice more questions from Science (NCERT)

A bullet of mass

10 g

travelling horizontally with a velocity of

150 m s^{- 1}

strikes a stationary wooden block and comes to rest in

0.03 s

. 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.

An object of mass

1

kg travelling in a straight line with a velocity of

10

s^{- 1}

collides with and sticks to a stationary wooden block of mass

5

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.

An object of mass

100 k g

is accelerated uniformly from a velocity of

5 m s^{- 1}

8 m s^{- 1}

6 s

. Calculate the initial and final momentum of the object. Also, find the magnitude of the force exerted on the object.

View all

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Question Text	An object of mass $1$ kg travelling in a straight line with a velocity of $10$ m $s^{- 1}$ collides with and sticks to a stationary wooden block of mass $5$ 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 On	Aug 22, 2023
Topic	Force and Laws of Motion
Subject	Science
Class	Class 9
Answer Type	Text solution:1 Video solution: 2
Upvotes	164
Avg. Video Duration	12 min

Text solutionVerified

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