EXAM CORNER - X STD - LAWS OF MOTION - Objective Questions
Question Bank - Laws of Motion -Physics
1.
Which is the correct for definition of
‘Kinematics’
a.
It deals with the motion of bodies without
considering the cause of motion.
b.
It deals with the motion of bodies considering
the cause of motion.
2.
That a moving body naturally comes to rest
without any external influence of the force. Such motions called as
a.
Violent motion
b.
Inertia of motion
c.
Force motion
d.
Natural motion
3.
1 Kg of cotton & ½ kg of wood dropped from
height – Which is dropped first..
a.
Wood
b.
Cotton
c.
Wood & cotton dropped equa
d.
Not the above
4.
When a force is applied on bodies, they resist
any change in their state. This property of bodies is called
a.
Force
b.
Inertia
c.
Natural motion
d.
Violent motion
5.
The resistance of a body to change its ______ is
called inertia of motion,
a.
Inertia of Rest
b.
Inertia of force
c.
Inertial of motion
d.
Inertia of direction
6.
A bowler running some speed before bowling – It’s
called
a.
Inertial of motion
b.
Inertia of Rest
c.
Inertia of Direction
d.
None of the above
7.
Linear Momentum is
a.
P= mc
b.
P=mv
c.
P=mr
d.
P=ma
8.
Linear momentum measures the impact of
a.
Inertial on body
b.
Mass on body
c.
Force on body
d.
Direction on body
9.
Newton’s first law –
a.
States that every body continues to be in its state of uniform
motion or the state of non uniform motion along a straight line unless it is
acted upon by some external force.
b.
States that every body continues to be in its state of rest or
the state of uniform motion along a straight line unless it is acted upon by
some external force.
c.
States that every body continues to be in its state of movement
or the state of uniform motion along a
straight line unless it is acted upon by some external force.
d.
None of the above
10.
Parallel unequal forces, F1= 3 kgs & F2= 5
Kgs are acting in opposite directions in
the body . So Resultant force is
a.
3 Kgs
b.
5 Kgs
c.
8 Kgs
d.
2 Kgs
11.
If Equilibrium arises if the vector sum of all
forces acting upon the particle is
a.
1
b.
-1
c.
0
d.
≠0
12.
If the
resultant force is not equal to Zero, then it causes the motion of the
body due to
a.
Balanced forces
b.
Unbalanced forces
c.
Inertial forces
d.
None of the above
13.
If a body is rotating about an axis, passing
through its centre of mass then its angular momentum is directed along its
a.
Radius
b.
Point of rotation
c.
Circumference
d.
Axis of rotation
14.
SI Unit of Moment of force unit is
a.
Kg
b.
Nm
c.
N
d.
Degree
15.
Moment of
force also called torque – is it true
a.
Yes
b.
No
16.
Which is the example for couple?
a.
The forces that two hands apply to turn a
steering wheel are often
b.
Bowler throwing the ball to the batsman
c.
Athletic running fast in the 100m race
d.
None of the above
17.
The algebraic sum of the moments of all the individual
forces about any point is equal to zero. This law applicable for
a.
Couple
b.
Resultant force
c.
Equilibrium
d.
Principle of moments.
18.
Newton’s Second
law –
a.
States that every body continues to be in its state of uniform
motion or the state of non-uniform motion along a straight line unless it is
acted upon by some external force.
b.
States that every body continues to be in its state of rest or
the state of uniform motion along a straight line unless it is acted upon by
some external force.
c.
States that force acting on a body is directly proportional
to the rate of change of linear momentum of body and the change in momentum
takes place in the direction of force.
d.
None of the above
19.
CGS Unit of forces is
a.
Nm
b.
N
c.
Dyne
d.
Kg
20.
Which is
correct ,
a.
1 N =1 kgms-2
b.
1 N= 1 gms-2
c.
1 N=1
dyne
d.
None of the above
21.
A large force acting for a very short interval
of time is called as
a.
Inertia Force
b.
Unidirectional force
c.
Impulsive force
d.
Coupling
22.
Impulse is not
equal to the magnitude of change in momentum. Is it true or false
a.
True
b.
False
23.
When a person swims he pushes the water using
the hands backwards , and the water pushes the swimmer in the forward direction.
This is belongs which law.
a.
Newton’s first Law
b.
Newton’s Second law
c.
Newton’s Third law
d.
Newton’s Universal Gravitational law
24.
Force between the masses is always attractive
and it does not depend on the medium where they are placed. This is belongs to
which law4.
a.
Newton’s first Law
b.
Newton’s Second law
c.
Newton’s Third law
d.
Newton’s Universal Gravitational law
25.
Where G is the universal gravitational constant.
Its value in SI unit is
a.
6.684 x 10-11 Nm2 kg-2
b.
6.674 x 10-11 Nm2 kg-2
c.
6.684 x 10-12 Nm2 kg-2
d.
6.674 x 10-12 Nm2 kg-2
26.
M = g R2 /G, What is the meaning of g.
a.
universal gravitational constant
b.
Acceleration due to gravity
c.
Weight of
the body in gms
d.
None of the above
27.
The value
of ‘g’ is maximum in the following region.
a.
Equatorial region
b.
Polar region
c.
Both a & b
d.
None of the above
28.
Weight of a body varies from one place to
another place on the Earth .Why..
a.
It depends on mass of the body
b.
It
depends on mass of the earth
c.
it depends on the acceleration due to gravity of
the Earth
d.
None of the above
29.
When a force F acts on a body for a period of
time t, then the product of force and time is known as
a.
Inertial of force
b.
Couple
c.
Impulse
d.
Acceleration due to gravity
30.
A door is pushed, at a point whose distance from
the hinges is 90 cm, with a force of 40N. Calculate the moment of the force
about the hinges
a.
40 N
b.
35 N
c.
38 N
d.
36 N
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