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Physics — SYSTEMS OF PARTICLES AND ROTATIONAL MOTION

50 Questions Class 11 MCQs
25:00 ⏱ Time
⚡ Progress 0 / 50 answered
1
A system of particles is best described as
2
The centre of mass of a system depends on
3
If no external force acts on a system, the centre of mass
4
Translational motion of a rigid body means
5
In pure rotational motion, each particle moves in
6
The axis of rotation is
7
Angular displacement is measured in
8
Angular velocity is defined as
9
Which quantity is same for all particles in rotational motion?
10
Torque is the rotational analogue of
11
The SI unit of torque is
12
Moment of inertia depends on
13
The SI unit of moment of inertia is
14
Greater the moment of inertia of a body
15
Angular momentum is conserved when
16
Rolling motion is a combination of
17
In rolling without slipping, the point of contact is
18
Linear momentum of a system equals
19
A rigid body differs from a particle because
20
For a rigid body in pure translation, angular velocity is
21
The centre of mass of a uniform rod lies
22
If a body rotates about its centre of mass, the COM
23
Torque is maximum when force acts
24
Which is conserved in absence of external force?
25
Which is conserved in absence of external torque?
26
The relation between linear and angular velocity is
27
Angular acceleration is caused by
28
A door opens easily when pushed
29
Which quantity changes when arms of a skater are folded?
30
In the above case, angular velocity
31
Moment of inertia plays the role of
32
The kinetic energy of a rotating body depends on
33
For the same torque, angular acceleration is
34
The centre of mass of a projectile follows
35
Internal forces in a system
36
Which quantity is vector in rotational motion?
37
A couple produces
38
Angular momentum depends on
39
If the radius doubles, linear velocity becomes
40
Which motion best represents combined motion?
41
The instantaneous axis of rotation
42
For a rigid body, distances between particles
43
In absence of gravity, centre of mass of a system
44
Rotational kinetic energy is given by
45
If torque is zero, angular acceleration is
46
The COM of an exploding object
47
Which factor does NOT affect moment of inertia?
48
Angular momentum is defined as
49
When a body rotates faster without external torque, its
50
Conservation of angular momentum is most useful in

Frequently Asked Questions

A system of particles is a collection of two or more particles considered together to study their combined motion.

Studying systems simplifies analysis by focusing on collective properties like centre of mass and total momentum.

A rigid body is an ideal body in which the distance between any two particles remains constant under applied forces.

It is motion in which all particles of the body move with the same velocity and acceleration at any instant.

Rotational motion is the motion of a body about a fixed axis where all particles move in circular paths.

It is an imaginary straight line about which a rigid body rotates.

The centre of mass is the point representing the average position of the mass of a system.

Yes, in some cases like a ring or a bent object, the centre of mass lies outside the material body.

Only external forces acting on the system govern the motion of the centre of mass.

The centre of mass remains at rest or moves with constant velocity.

It is the vector sum of the momenta of all particles in the system.

If the net external force on a system is zero, its total linear momentum remains constant.

It is the angle through which a body rotates about a fixed axis.

Angular velocity is the rate of change of angular displacement with time.

It is the rate of change of angular velocity with time.

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