1 ) Balanced forces are unequal in magnitude and act in opposite direction.
A ) False
B ) True
Ans A ) False
2 ) is required to change the state of rest or uniform motion of a body in a straight line.
A ) Mass
B ) Velocity C ) Force D ) Inertia
Ans C ) Force
3 ) A person slips over banana peel or mud, due to …………… .
A ) Decrease in frictional force.
B ) Increase in frictional force.
C ) Increase in gravitational force.
D ) Decrease in gravitational force.
Ans A ) Decrease in frictional force.
4 ) A fluid enclosed in a container exerts its pressure in all directions at a point within the fluid.
A ) Equally
B ) Non-uniformly
Ans A ) Equally
4 ) Force : N :: Pressure: ……………
A ) N/m B ) N/m2 C ) N/m3
Ans B ) N/m2
5 ) SI unit of Pressure is ………………
A ) Newton
B ) N/m
C ) Pascal
Ans C ) Pascal
6 ) The object floats inside the liquid if the buoyant force is equal to its weight.
A ) True
B ) False
Ans A ) True
7 ) Match the column
|
Column-A |
Column-B |
||
|
i. |
Contact force |
a. |
Two forces acting in opposite direction. |
|
ii. |
Balanced force |
b. |
Boy kicking the ball |
|
c. |
Two force acting in same direction. |
||
|
d. |
Apple falling from the tree |
A )
|
Column-A |
Column-B |
|||
|
i. |
Contact force |
a. |
Boy kicking the ball |
|
|
ii. |
Balanced force |
b. |
Two force acting in opposite direction. |
|
|
Column-A |
Column-B |
|||
|
i. |
Contact force |
a. |
Apple falling from the tree |
|
|
ii. |
Balanced force |
b. |
Two force acting in same direction. |
|
B )
Ans
|
Column-A |
Column-B |
||
|
i. |
Contact force |
a. |
Boy kicking the ball |
|
ii. |
Balanced force |
b. |
Two force acting in opposite direction. |
A )
8 ) Air pressure as one goes up in height from the sea level.
A ) Increases
B ) Decreases
Ans B ) Decreases
9 ) Lactometer works on Archimedes principle.
A ) True
B ) False
Ans A ) True
10 ) The property of a liquid to exert an upward force on an object immersed in it is called …………… .
A ) Pressure
B ) Force
C ) Buoyancy
D ) Density
Ans C ) Buoyancy
11 ) A person gets a forward jerk when a car stops suddenly due to ……………
A ) Inertia of direction B ) Inertia of motion C ) The velocity of car
D ) Weight of the person
Ans B ) Inertia of motion
12 ) Force exerted perpendicularly on a unit area is called ………………
A ) Balanced force
B ) Pressure
Ans B ) Pressure
13 ) We cannot stand at one place for a long time but can sleep on a place for long hours.
A ) True
B ) False
Ans A ) True
14 ) 1 bar = mbar
A ) 103
B ) 102
C ) 10
Ans A ) 103
15 ) Classify the following into contact and non-contact force.
Walking on the road.
A ) Contact force
B ) Non-contact force
Ans A ) Contact force
16 ) In absence of force, object will continue to be in the state of rest.
A ) False
B ) True
Ans B ) True
17 ) 1 Atmosphere = Pa
A ) 101 x 103
B ) 10.1 x 103
C ) 10.1 x 102
Ans A ) 101 x 103
18 ) Lifting, pushing, pulling are examples of force.
A ) Magnetic
B ) Muscular
C ) Gravitational
Ans B ) Muscular
19 ) Pressure as the depth of the liquid increases.
A ) Increases
B ) Decreases
Ans A ) Increases
20 ) Classify the following into contact and non-contact force.
An apple falling from the tree.
A ) Contact force
B ) Non-contact force Ans B ) Non-contact force 22 ) The SI unit of density.
A ) g/cc B ) Kg/cc C ) Kg/m3
Ans C ) Kg/m3
21 ) According to Archimedes principle, the buoyant force is equal to the weight of the fluid displaced by the object.
A ) False
B ) True
Ans B ) True
22 ) Classify the following into contact and non-contact force.
A cricket ball rolling down a cricket field.
A ) Contact force
B ) Non-contact force
Ans A ) Contact force
23 ) In tug of war, if the rope does not move, then balanced forces are acting on the rope.
A ) True
B ) False
Ans A ) True
24 ) Buoyant force is downward force acting on the object in water.
A ) True
B ) False
Ans B ) False
25 ) It is easier to swim in fresh water than in sea water.
A ) True
B ) False
Ans B ) False
26 ) Relative density has no units because …………… .
A ) It’s a ratio
B ) It’s a number
C ) It’s an inherent property of substance
D ) It’s a ratio of two similar quantities
Ans D ) It’s a ratio of two similar quantities
27 ) The atmosphere exists to about height.
A ) 14km
B ) 16km
Ans B ) 16km
28 ) Relative density of a substance is expressed w.r.t the density of water.
A ) True
B ) False
Ans A ) True
29 ) Classify the following into contact and non-contact force.
Boy lifting a book from the table.
A ) Contact force
B ) Non-contact force
Ans A ) Contact force
30 ) An instrument based on the Archimedes principle.
A ) Hydrometer
B ) Voltameter
Ans A ) Hydrometer
31 ) In atmospheric science, the unit for pressure is ………………
A ) Pascal
B ) Bar
C ) Newton
Ans B ) Bar
32 ) The pressure created due to air is called the pressure.
A ) Atmospheric
B ) Barometer
Ans A ) Atmospheric
33 ) The buoyant force is more if the volume of the dipping object is more.
A ) True
B ) False
Ans A ) True
34 ) The property of density is useful in deciding the purity of substance.
A ) False
B ) True
Ans B ) True
35 ) In unbalanced forces, the net force acting on the body is not zero.
A ) False
B ) True
Ans B ) True
36 ) The atmospheric pressure at a point in air is from all sides.
A ) Different
B ) Equal
Ans B ) Equal
37 ) The buoyant force is greater if volume of object submerged in liquid is …………… .
A ) Smaller B ) Larger C ) Equal D ) Half
Ans B ) Larger
38 ) pressure is exerted on all the objects kept in air.
A ) Air
B ) Liquid
Ans A ) Air
39 ) Formula for pressure is ………………
A ) P= F/A
B ) P=A/F
Ans A ) P= F/A
40 ) Classify the following into contact and non-contact force.
Pins getting attracted to the magnet.
A ) Contact force
B ) Non-contact force
Ans B ) Non-contact force
41 ) If area increases, pressure for the same force.
A ) Increases
B ) Decreases
Ans B ) Decreases
42 ) Density does not have any units.
A ) False
B ) True
Ans A ) False
43 ) Classify the following into contact and non-contact force.
A boy stretching the rubber band.
A ) Contact force
B ) Non-contact force
Ans A ) Contact force
44 ) Force is a scalar quantity.
A ) True
B ) False
Ans B ) False
44 ) 1kg/m3 = …………… .
A ) 10-3 g/cm3 B ) 103 g/cm3 C ) 1 g/cm3
D ) 100 g/cm3
Ans A ) 10-3 g/cm3
45 ) If two forces are acting on an object in same direction, then a force equal to their addition acts on that object.
A ) False
B ) True
Ans B ) True
46 ) According to Newton’s first law of motion, an object continues to be in the state of rest, if no force is acting on it.
A ) True
B ) False
Ans A ) True
47 ) Match the column
|
Column-A |
Column-B |
||
|
i. |
Inertia of motion |
a. |
Passengers thrown opposite to the direction of turning. |
|
ii. |
Inertia of direction |
b. |
Fan continue to revolve even after switching. |
|
c. |
Coin falls in the glass after the cardboard is removed. |
A )
|
Column-A |
Column-B |
|||
|
i. |
Inertia of motion |
a. |
Coin falls in the glass after the cardboard is removed. |
|
|
ii. |
Inertia of direction |
b. |
Fan continue to revolve even after switching. |
B )
|
Column-A |
Column-B |
||
|
i. |
Inertia of motion |
a. |
Fan continue to revolve even after switching. |
|
ii. |
Inertia of direction |
b. |
Passengers thrown opposite to the direction of turning. |
Ans
|
Column-A |
Column-B |
||
|
i. |
Inertia of motion |
a. |
Fan continue to revolve even after switching. |
|
ii. |
Inertia of direction |
b. |
Passengers thrown opposite to the direction of turning. |
B )
48 ) An iron nail sinks in water but a massive ship floats on water due to liquid pressure.
A ) True
B ) False
Ans B ) False
49 ) Another term for relative density.
A ) Specific relativity
B ) Specific gravity
Ans B ) Specific gravity
50 ) The buoyant force is …………… if density of liquid is …………… .
A ) Greater, lesser
B ) Zero, lesser
C ) Lesser, greater
D ) Lesser, lesser
Ans D ) Lesser, lesser
51 ) The car stopping after the brakes are applied is an example of frictional force.
A ) True
B ) False
Ans A ) True
52 ) A force is expressed in magnitude and direction.
A ) True
B ) False
Ans A ) True
53 ) More the density of liquid, more is the force of buoyancy.
A ) True
B ) False
Ans A ) True
54 ) It is easy to cut vegetables with a sharp knife.
A ) False
B ) True
Ans B ) True
55 ) A force applied to a body through a direct contact of the objects or via one more object is called ……………
force.
A ) Contact
B ) Non-contact
C ) Balanced
Ans A ) Contact
56 ) While pulling a bucket from a well, it appears to be lighter when fully immersed in water than when it is pulled out of water.
A ) True
B ) False
Ans A ) True
57 ) The density of sea water is less than fresh water.
A ) False
B ) True
Ans A ) False
58 ) Acceleration of the car is an example of balanced forces.
A ) False
B ) True
Ans A ) False
59 ) The SI unit of force is dyne.
A ) False
B ) True
Ans A ) False
60 ) force is very useful in daily life.
A ) Magnetic
B ) Electrostatic
C ) Frictional
Ans C ) Frictional
61 ) The object floats if the buoyant force is smaller than its weight.
A ) False
B ) True
Ans A ) False
62 ) The tendency of an object to remain in its existing state is called its inertia.
A ) True
B ) False
Ans A ) True
63 ) Passenger sitting in running bus gets a jerk in forward direction if bus stops suddenly.
A ) True
B ) False
Ans A ) True
64 ) All objects in motion have frictional force acting on them.
A ) False
B ) True
Ans B ) True
65) When force is applied on the head of the nail, it is easy to hammer it into the plank.
A ) False
B ) True
Ans B ) True
66 ) Force cannot change the state of motion of an object.
A ) False
B ) True
Ans A ) False
67 ) Classify the following into contact and non-contact force.
A plastic ruler on being moved through dry hair, brought near pieces of paper.
A ) Contact force
B ) Non-contact force
Ans B ) Non-contact force
68 ) All gases and liquids have a common name ……………
A ) Mixtures
B ) Fluids
Ans B ) Fluids
69 ) Vegetable vendor keeps a twisted cloth above the head below the basket to reduce the pressure.
A ) True
B ) False
Ans A ) True
70 ) Muscular force is an example of non-contact force.
A ) True
B ) False
Ans B ) False
71 ) Balanced forces keep the body at rest.
A ) True
B ) False
Ans A ) True
72 ) When weight is kept on a solid, pressure is exerted on it.
A ) True
B ) False
Ans A ) True
73) At any one level, the liquid pressure is ……………
A ) Different
B ) Same
Ans B ) Same
74 ) As we go higher, atmospheric pressure …………… .
A ) Increases
B ) Decreases
C ) Remains same
D ) Initially decreases and then increases
Ans B ) Decreases
75 ) A force applied between two objects even if the two objects are not in contact is called force.
A ) Contact
B ) Non-contact
C ) Un-balanced
Ans B ) Non-contact
76 ) Air pressure: Atmospheric Pressure:: Upward force on object in water: ……………
A ) Buoyant force
B ) Specific gravity
Ans A ) Buoyant force
77 ) When a wooden block is pushed, the force acting on it is …………… .
A ) Electric
B ) Unbalanced
C ) Balanced
D ) Nuclear
Ans B ) Unbalanced
78 ) While walking, we don’t slip due to force acting in opposite direction.
A ) Muscular
B ) Frictional
C ) Gravitational
Ans B ) Frictional
79 ) Archimedes principle has been used in submarines.
A ) False
B ) True
Ans B ) True
80 ) When unequal forces are applied to the box on the two sides, a balanced force acts on the box.
A ) True
B ) False
Ans B ) False
81 ) An object can change its shape due to force.
A ) True
B ) False
Ans A ) True
82 ) A force is required to stop an object in motion.
A ) True
B ) False
Ans A ) True
83) When an object is dipped in a liquid, a buoyant force acts on it.
A ) True
B ) False
Ans A ) True
