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1
Which of the following is an example of a non-contact force?
Muscular force
Frictional force
Magnetic force
None of these
2
Force exerted by an object with electric charge on it is called ________________________.
Electrostatic force
Gravitational force
3
When we apply a force on a body to make it move but and it does not move, the force applied is balanced by the force of friction. Such force of is called _________________ .
Rolling friction
Static friction
Sliding friction
None of these .
4
A bullet in motion hits and gets embedded in a solid resting on a frictionless table. What is conserved ?
Momentum and kinetic energy
Momentum alone
Kinetic energy alone
Neither momentum nor kinetic energy
5
Correct air pressure in our vehicle tyres help to reduce?
static friction
sliding friction
roling friction
all of the above
6
The motion of the moon around the earth is due to __________________ provided by the force of attraction of the Earth.
Centrifugal force
Centripetal force
7
Two forces F1 and F2 act on a system at t1 and t2 instances of time. what is the ratio of the acceleration produced?
F1+ F2: F1
F2: F2
F1:F2
3F1:2F2
8
A and B are two objects with mass 6 kg and 34 kg respectively. Then
A has more intertia than B
B has more intertia A
A and B both have same intertia
none of the above is true
9
Newton used the phrase 'quantity of motion' for
momentum
force
acceleration due to gravity
none of these
10
Which of the following action describes pushing by a body?
Kicking
Lifting
Picking
Opening
11
The mass and speed of four bodies are:
7 m/s
The body with the largest magnitude of momentum is
A
B
C
D
12
The principle of conservation of linear momentum states that the linear momentum of a system
cannot be changed
cannot remain constant
can be changed only if internal forces act
can be changed only if external forces act
13
Which of the following are correct :
(a) The motion of the moon around the earth is due to centripetal force provided by the force of attraction of the Earth.
(b) Planets around the sun is due to centripetal force.
Only (a) is correct.
Only (b) is correct.
Both (a) and (b) are correct.
None of these.
14
A particle is moving with a constant speed along a straight line path. A force is not required to _____________________.
increase its speed
decrease the momentum
Change the direction
keep it moving with uniform velocity
15
(a) The motion of the moon around the earth is due to centrifugal force provided by the force of attraction of the Earth.
(b) Going through aloop on aroller coaster is due to centripetal force.
(c) The motion of the moon around the earth is due to centripetal force provided by the force of attraction of the Earth.
Only (a) and (b) are correct.
Only (b) and (c) are correct.
Only (a) and (c) are correct.
16
What should be the velocity of an object with mass 3000g moving around a circle of 30m radius when a force of 2N is applied.?
17
Which of the following is NOT attributable to application of force ?
Rowing of a boat
Bursting of a balloon while blowing
Pedaling a cycle
Catching a moving cricket ball
18
Which of the following are correct ?
(a) The force of friction acting between the two surfaces, when one of them just slides over the other surface with a uniform speed is called sliding friction.
(b) Static friction is less than the sliding friction .
(c) Force applied to a body that is placed over the other bodies like roller or a wheel and is allowed to move this is called rolling friction .
Only (a) and (b) is correct .
Only (b) and (c) is correct .
Only (a) and (c) is correct .
All of these .
19
Which of the following is not a non contact force ?
20
(a) A pull or push over an object because of its interaction with other object is called force.
(b) The examples of state of rest are a building, an electric pole, a ball kept over the ground and not moving, etc.
(c) The SI unit of force is Newton “N”.