Laws of Motion MCQ Questions Class 11 Physics Chapter 5
NCERT MCQ Questions for Class 11 Physics Chapter 5 Laws of Motion. Laws of Motion MCQ Questions with Answers from Class 11 Physics.
Laws of Motion MCQ Questions Class 11 Physics Chapter 5
Laws of Motion Multiple Choice Questions with Answers Class 11 Physics Chapter 5 PDF is available.
1) ______ is required to keep a body in motion.
a) External velocity
b) External acceleration
c) External force
d) External torque
Ans: c) external force
2) The law of inertia was given by
a) Newton
b) Galileo
c) Einstein
d) Maxwell
Ans: b) Galileo
3) Every body continues to be in its state of rest or of uniform motion in a straight line unless compelled by some external force to act otherwise. This is the
a) Law of inertia
b) First law of motion
c) Both a and b
d) None
Ans: c) both a and b
4) A body at rest continues to remain at rest and a body in motion continues to move with uniform velocity only if
a) Net external force is non zero
b) Net external force is zero
c) Both a and b
d) None
Ans: b) net external force is zero
5) Inertia is nothing but the
a) Opposition
b) Resistance to change
c) Both a and b
d) None
Ans: b) resistance to change
6) If the net external force on a body is zero then it’s
a) Velocity is also zero
b) Acceleration is zero
c) Acceleration is non zero
d) None
Ans: b) acceleration is zero
7) Acceleration can be non zero only if there is
a) No net external force on the body
b) A net external force on the body
c) Both a and b
d) None
Ans: b) a net external force on the body
8) The momentum of the body is the product of
a) Mass and acceleration
b) Mass and velocity
c) Mass and displacement
d) None
Ans: b) mass and velocity
9) Momentum is the
a) Scalar quantity
b) Vector quantity
c) Tensor quantity
d) None
Ans: b) vector quantity
10) The greater the rate of change of momentum
a) Less is the force
b) Greater is the force
c) Force is zero
d) None
Ans: b) greater is the force
11) The same force for the same time causes the _____ change in momentum for different bodies.
a) Different
b) Constant
c) Same
d) None
Ans: c) same
12) The rate of change of momentum of a body is
a) Inversely proportional to applied force
b) Directly proportional to applied force
c) Does not depends on applied force
d) None
Ans: b) directly proportional to applied force
13) The rate of change of momentum of a body is directly proportional to applied force and takes place
a) In the direction in which the force acts
b) In the direction opposite to the force acts
c) Both a and b
d) None
Ans: a) in the direction in which the force acts
14) The rate of change of momentum of a body is directly proportional to applied force and takes place in the direction in which the force acts. This is
a) First law of motion
b) Law of inertia
c) Second law of motion
d) Third law of motion
Ans: c) second law of motion
15) The momentum of the body is given by
a) P= m/v
b) P= mv
c) P= v/m
d) P= mc2
Ans: b) P= mv
16) The second law of motion can be stated as
a) F = k*(dv/dt)
b) F = k*(dp/dt)
c) F= k*(da/dt)
d) None
Ans: b) F = k*(dP/dt)
17) The second law of motion can also be stated as
a) F = m*a
b) F= m/a
c) F= a/m
d) None
Ans: a) F = m*a
18) The SI unit of force is
a) Newton N
b) Joule J
c) Watt W
d) None
Ans: a) Newton N
19) In the second law, if F= 0 then
a) Acceleration = 0
b) Velocity = 0
c) Mass = 0
d) Nine
Ans: a) acceleration = 0
20) If the force is changing with respect to time then we define
a) Torque
b) Impulse
c) Both a and b
d) None
Ans: b) impulse
- In case you have missed:- Previous Chapter MCQ Questions
21) Impulse is given by
a) Impulse = force*mass
b) Impulse = force*time duration
c) Impulse = mass*acceleration
d) None
Ans: b) Impulse = force*time duration
22) Impulse is also given by
a) Impulse = force* time duration
b) Impulse = change in momentum
c) Both a and b
d) None
Ans: c) both a and b
23) A large force acting for a short time to produce a finite change in momentum is called a) impulse
b) torque
c) force
d) impulsive force
Ans: d) impulsive force
24) To every action there is
a) Not equal and opposite reaction
b) Equal and opposite reaction
c) Both a and b
d) None
Ans: b) equal and opposite reaction
25) To every action there is an equal and opposite reaction. This is the
a) First law of motion
b) Second law of motion
c) Law of inertia
d) Third law of motion
Ans: d) third law of motion
26) Forces always occurs in
a) Triplets
b) Quarter
c) Pairs
d) None
Ans: c) pairs
27) The total momentum of an isolated system of interacting particles is
a) Not conserved
b) Conserved
c) Both a and b
d) None
Ans: b) conserved
28) Equilibrium of a particle in mechanics refers to the situation when
a) Net external force in the particle is non zero
b) Net external force on the particle is zero
c) Both a and b
d) None
Ans: b) net external force on the particle is zero
29) The component of contact force normal to the surface in contact is called
a) Friction
b) Normal reaction
c) Both a and b
d) None
Ans: b) normal reaction
30) The component parallel to the surfaces in contact is called
a) Friction
b) Normal reaction
c) Both a and b
d) None
Ans: a) friction
31) The spring force is given by
a) F = kx
b) F = k/X
c) F = -k/X
d) F = -kx
Ans: d) F = -kx
32) When the car is in motion on a level road then forces acting on it are
a) The weight of the car mg
b) Normal reaction N
c) Frictional force f
d) All
Ans: d) all
33) F = ma is the
a) Scalar equation
b) Vector equation
c) Both a and b
d) None
Ans: b) vector equation
34) Force on a body A by body B is ______ to the force on the body B by A.
a) Equal
b) Opposite
c) Equal and opposite
d) None
Ans: c) equal and opposite
35) The SI unit of momentum is
a) N
b) N/s
c) NS
d) Ns2
Ans: c) Ns
36) The SI unit of impulse is
a) N
b) N/s
c) NS
d) Ns2
Ans: c) Ns
37) The SI unit of force is
a) N
b) N/s
c) NS
d) None
Ans: a) N
38) The SI unit of static friction is
a) N
b) N/s
c) NS
d) None
Ans: a) N
39) The SI unit of kinetic friction is
a) N
b) NS
c) N/s
d) None
Ans: a) N
40) Momentum is the
a) Scalar quantity
b) Vector quantity
c) Tensor quantity
d) None
Ans: b) vector quantity
- In case you have missed:- Next Chapter MCQ Questions