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Published on: 09/11/2020
11th Standard Physics Laws of Motion English Medium Free Online Test One Mark Questions 2020 - 2021
Download Tamil Nadu 11th Standard Physics question papers, model tests, one-mark questions, important questions, and public exam papers in PDF format. Free study materials and answer keys for TN State Board students.
Questions + Answers key
Take MCQ Physics Test1.
When a body is moving on a surface, the force of friction is called_____ friction.
Static
Kinetic
Limiting
Rolling
2.
A force of 2.5 N acts on a body of mass 10 g. What is the acceleration of the body?
1.5\(\times\)102 ms-2
2.0\(\times\)103 ms-2
2.5\(\times\)103 ms-2
3.0\(\times\)102 ms-2
3.
A body of mass 20 kg moving with a uniform velocity of 4 ms-1. Then the net force acting on a body is _____________.
constant
increase
decrease
Zero
4.
When milk is churned, cream gets separated due to ______________.
Centripetal force
Centrifugal force
Frictional force
Gravitational force
5.
A marble block of mass 3 kg lying on ice when given a velocity of 5 ms-1 is stopped by friction in 10s. Then the coefficient of friction is ______________.
0.01
0.05
0.03
0.06
6.
The motion of a rocket is based on the principle of conservation of _____________.
Linear momentum
K.E
Mass
Angular momentum
7.
A particle is acted upon by a force of constant magnitude which is always perpendicular to the velocity of the particle. The motion of the particle takes place in the plane. It follows that ______________.
The speed of the particle is constant.
The motion is that of projectile.
The acceleration of the particle is constant.
The velocity of the particle is constant
8.
If a reaction is R and coefficient of friction is μ, what is work done against friction in moving a body by distance d?
2 μRd
\(\frac { \mu Rd }{ 4 } \)
μRd
\(\frac { \mu Rd }{ 2 } \)
9.
Three blocks of masses 2 kg, 3 kg and 5 kg are connected to each other with light string & then placed on a frictionless surface. The system is pulled by a force F = 10N, then tension T1 is ______________.
1N
8N
5N
10N
10.
A spacecraft of mass M moving with velocity v in free space explodes and breaks into two pieces. After the explosion a mass m of the spacecraft is left stationary. The velocity of other part is _______________.
\(\frac { mv }{ M-n } \)
\(\frac { M+n }{ Mv } \)
\(\frac { Mv }{ M-m } \)
\(\frac { Mv }{ m } \)
11.
A body is moving in a circle with uniform speed v. In moving from a point to another diametrically opposite point.
The momentum changes by mv
K.E. changes by 1/2mv2
The momentum changes by 2mv
K.E changes by mv2
12.
Dimensions of impulse are same as that of ________________.
Force
Momentum
Energy
Acceleration
13.
A block is kept on a frictionless inclined surface with angle of inclination ∝, The incline is given an acceleration a to keep the block stationary. Then a is equal to _____________.
g cosec ∝
g
\(\frac { g }{ tan\ \alpha } \)
g tan ∝
14.
A block of mass M is pulled along a horizontal frictionless surface by a rope of mass m. A force F is applied at the free end of the rope. The force exerted by the rope on the block ____________.
\(\frac { MF }{ M+m } \)
\(\frac { M+m }{ MF } \)
\(\frac { M }{ M-m } \) .F
\(\frac { M-m }{ M } \) .F
15.
A ball with an initial momentum P collides normally with a rigid wall. If P1 is the linear momentum after the perfectly elastic collision, then ____________.
P1 = P
P1 = -P
P1 = 2P
P1 =-2P
16.
Physical independence of force is a consequence of _______________.
III law of motion
I law
II law
All
17.
The centrifugal force appears to exist
only in inertial frames
only in rotating frames
in any accelerated frame
both in inertial and non-inertial frames
18.
Force acting on the particle moving with constant speed is
always zero
need not be zero
always non zero
cannot be concluded
19.
Two masses m1 and m2 are experiencing the same force where m1 < m2.The ratio of their acceleration \(\frac { { a }_{ 1 } }{ { a }_{ 2 } } \) is _____________.
1
less than 1
greater than 1
all the three cases
20.
When a car takes a sudden left turn in the curved road, passengers are pushed towards the right due to
inertia of direction
inertia of motion
inertia of rest
absence of inertia
1.
(b)
Kinetic
2.
(c)
2.5\(\times\)103 ms-2
3.
(d)
Zero
4.
(b)
Centrifugal force
5.
(b)
0.05
6.
(a)
Linear momentum
7.
(a)
The speed of the particle is constant.
8.
(c)
μRd
9.
(b)
8N
10.
(c)
\(\frac { Mv }{ M-m } \)
11.
(c)
The momentum changes by 2mv
12.
(b)
Momentum
13.
(d)
g tan ∝
14.
(a)
\(\frac { MF }{ M+m } \)
15.
(b)
P1 = -P
16.
(b)
I law
17.
(b)
only in rotating frames
18.
(b)
need not be zero
19.
(c)
greater than 1
20.
(a)
inertia of direction
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