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A boy is sitting on a chair placed on the floor of a room. Wri
Concepts of Physics by H. C. Verma
Concepts of Physics

Class 11

HC Verma Part I

Author:
H. C. Verma
Subject:
Physics
1

Chapter 1: Introduction to Physics

35 questions

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2

Chapter 2: Physics and Mathematics

60 questions

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3

Chapter 3: Rest and Motion: Kinematics

88 questions

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4

Chapter 4: The Forces

33 questions

Q1
A body of mass m is placed on a table. The earth is pulling the body with a force mg. Taking this force to be the action what is the reaction?
Q2
A boy is sitting on a chair placed on the floor of a room. Write as many action-reaction pairs of forces as you can.
Q3
A lawyer alleges in court that the police had forced his client to issue a statement of confession. What kind of force is this ?
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5

Chapter 5: Newton's Law of Motion

82 questions

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6

Chapter 6: Friction

57 questions

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7

Chapter 7: Circular Motion

63 questions

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8

Chapter 8: Work and Energy

101 questions

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9

Chapter 9: Centre of Mass, Linear momentum Collision

119 questions

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10

Chapter 10: Rotational Mechanics

149 questions

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11

Chapter 11: Gravitation

80 questions

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12

Chapter 12: Simple Harmonic Motion

111 questions

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13

Chapter 13: Fluid Mechanics

81 questions

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14

Chapter 14: Some Mechanical Properties of Matter

87 questions

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15

Chapter 15: Wave Motion and Waves on a String

96 questions

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16

Chapter 16: Sound Waves

118 questions

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17

Chapter 17: Light Waves

79 questions

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18

Chapter 18: Geometrical optics

123 questions

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19

Chapter 19: Optical Instruments

52 questions

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20

Chapter 20: Dispersion and Spectra

27 questions

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21

Chapter 21: Speed of Light

14 questions

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22

Chapter 22: Photometry

38 questions

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Question
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A boy is sitting on a chair placed on the floor of a room. Write as many action-reaction pairs of forces as you can.

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Concepts of Physics (HC Verma Part I)

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The given situation involves two action-reaction pairs of forces. They are :

(a) The action force (F = mg) with which the boy pushes the chair in the downward direction and the reaction force (F' =mg) with which the chair exerts on the boy in the upward direction.

(b) The action force (F = (M + m)g) with which the boy and the chair push the ground in the downward direction and the reaction force (F' = (M + m)g) with which the ground exerts on the boy and the chair in the upward direction. 
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Practice questions from Concepts of Physics (HC Verma Part I)

Question 1
Easy
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Views: 5,810

A person says that he measured the acceleration of a particle to be non-zero even though no force was acting on the particle.
  1. He is a liar
  2. His clock might have run slow
  3. His meter scale might have been longer than the standard
  4. He might have used noninertial frame
Topic

Topic:

Laws of motion

Book

Book:

Concepts of Physics (HC Verma Part I)

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Question 2
Easy
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Why is it easier to push a heavy block from behind than to press it on the top and push?
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Topic:

Laws of motion

Book

Book:

Concepts of Physics (HC Verma Part I)

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Question 3
Easy
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A boy puts a heavy box of mass M on his head and jumps from the top of a multi-storied building to the ground. What is the force exerted by the box on the boy's head during his free fall? Does the force greatly increase during the period he balances himself after striking the ground?
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Topic:

Laws of motion

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Book:

Concepts of Physics (HC Verma Part I)

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Question 4
Easy
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When Neils Bohr shook hand with Werner Heisenberg, what kind of force they exerted?
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  2. Electromagnetic
  3. Nuclear
  4. Weak
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Topic:

Laws of motion

Book

Book:

Concepts of Physics (HC Verma Part I)

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A boy of mass is applying a horizontal force to slide a box of mass on a rough horizontal surface. The coefficient of friction between the shoes of the boy and the floor is and that between the box and the floor is . In which of the following cases it is certainly not possible to slide the box ?
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Question 2
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Block A of mass is placed on another block of mass , and block rests on a smooth horizontal table. For sliding block A on B, a horizontal force of is required to be applied to it. How much maximum horizontal force can be applied on so that both and move together? Also, find out the acceleration produced by this force.
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Practice questions on similar concepts asked by Filo students

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A spring balance reads when a bucket of water is suspended from it. What is the reading on the spring balance when an ice cube of mass is put into the bucket
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An electron is confined to moving in the xy plane. The Hamiltonian of the system is p^3 + p^2 Ho + V(x,y) / 2m with a potential V(x,y)=V(r), where r = sqrt(x^2 + y^2).
  1. i) Show, including explicit commutator calculations, that A0, L, and S are a complete set of compatible observables and that, as a result, the states can be labeled in the form (E, m, ms). Explain the meanings of those symbols. Hint: Recall that L can be written in both algebraic and differential-operator form.
  2. Assume now that the potential is such that the spectrum is purely discrete with ground state energy E0 and no orbital angular momentum in the ground state (m = 0).
  3. ii) In the presence of a magnetic field, such a system might involve the extra term in the Hamiltonian A = cSx. Find the leading corrections to the (degenerate!) ground state energies and their states due to A.
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Q.1 A body is moving with speed on a incine plan as shown in figure. Find linear momentum of body
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Fig. 3.19 3.3 A woman starts from her home at , walks with a speed of on a straight road up to her office away, stays at the office up to , and returns home by an auto with a speed of . Choose suitable scales and plot the graph of her motion. 3.4 A drunkard walking in a narrow lane takes 5 steps forward and 3 steps backward, followed again by 5 steps forward and 3 steps backward, and so on. Each step is 1 long and requires . Plot the graph of his motion. Determine graphically and otherwise how long the drunkard takes to fall in a pit away from the start. 3.5 A jet airplane travelling at the speed of ejects its products of combustion at the speed of relative to the jet plane. What is the speed of the latter with respect to an observer on the ground ? 3.6 A car moving along a straight highway with speed of is brought to a stop within a distance of . What is the retardation of the car lassumed uniform), and how long does it take for the car to stop? 3.7 Two trains A and of length each are moving on two parallel tracks with a uniform speed of in the same direction, with ahead of . The driver of decides to overtake and accelerates by . If after tha . The driver of
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Question Text
A boy is sitting on a chair placed on the floor of a room. Write as many action-reaction pairs of forces as you can.
TopicLaws of motion
SubjectPhysics
ClassClass 11
Answer TypeText solution:1
Upvotes180