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Physics Part-I

Motion in Straight Line

A police van moving on a highway with a speed of 30 km/hr fire

Physics Part-I

Class 11

NCERT

Chapter 1: Physical World

16 questions

Chapter 2: Units and Measurements

51 questions

Chapter 3: Motion in Straight Line

50 questions

Figure shows the x-t plot of one-dimensional motion of a particle. Is it correct to say from the graph that the particle moves in a straight line for t < 0 and on a parabolic path for t > 0 ? If not, suggest a suitable physical context for this graph.

A police van moving on a highway with a speed of

30 km / h r

fires a bullet at a thief's car speeding away in the same direction with a speed of 192 \ km/hr. If the muzzle speed of the bullet is

150 m / s

, with what speed does the bullet hit the thief's car ? (Note:Obtain that speed which is relevant for damaging the thief's car).

Suggest a suitable physical situation for each of the following graphs (Fig):

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Chapter 4: Motion in a Plane

43 questions

Chapter 5: Laws of motion

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Chapter 6: Work, Energy and Power

41 questions

Chapter 7: System of Particles and Rotational Motion

45 questions

Chapter 8: Gravitation

33 questions

Question

Medium

Solving time: 2 mins

A police van moving on a highway with a speed of $30 km / h r$ fires a bullet at a thief's car speeding away in the same direction with a speed of 192 \ km/hr. If the muzzle speed of the bullet is $150 m / s$ , with what speed does the bullet hit the thief's car ? (Note:Obtain that speed which is relevant for damaging the thief's car).

Views: 5,684 students

Updated on: Oct 13, 2023

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Physics Part-I (NCERT)

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Mila Discussed

A police van moving on a highway with a speed of

30 km / h r

fires a bullet at a thief's car speeding away in the same direction with a speed of 192 \ km/hr. If the muzzle speed of the bullet is

150 m / s

, with what speed does the bullet hit the thief's car ? (Note:Obtain that speed which is relevant for damaging the thief's car).

8 mins ago

Discuss this question LIVE

8 mins ago

Text solutionVerified

Speed of the police van,

v_{p} = 30 km / h = 8.33 m / s

Muzzle speed of the bullet,

v_{b} = 150 m / s

Speed of the thiefs car,

v_{t} = 192 km / h = 53.33 m / s

Since the bullet is fired from a moving van, its resultant speed can be obtained as:

= 150 + 8.33 = 158.33 m / s

Since both the vehicles are moving in the same direction, the velocity with which the bullet hits the thiefs car can be obtained as:

v_{b t} = v_{b} - v_{t}

= 158.33 - 53.33 = 105 m / s

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Practice more questions from Physics Part-I (NCERT)

A police van moving on a highway with a speed of

30 km / h r

fires a bullet at a thief's car speeding away in the same direction with a speed of 192 \ km/hr. If the muzzle speed of the bullet is

150 m / s

, with what speed does the bullet hit the thief's car ? (Note:Obtain that speed which is relevant for damaging the thief's car).

Suggest a suitable physical situation for each of the following graphs (Fig):

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Question Text	A police van moving on a highway with a speed of $30 km / h r$ fires a bullet at a thief's car speeding away in the same direction with a speed of 192 \ km/hr. If the muzzle speed of the bullet is $150 m / s$ , with what speed does the bullet hit the thief's car ? (Note:Obtain that speed which is relevant for damaging the thief's car).
Updated On	Oct 13, 2023
Topic	Motion in Straight Line
Subject	Physics
Class	Class 11
Answer Type	Text solution:1 Video solution: 8
Upvotes	852
Avg. Video Duration	7 min

Text solutionVerified

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