MCQ 11 Mark
The pressure which is exerted by air around us is known as
- Aforce
- ✓atmospheric pressure
- Cmuscular force
- Dfriction
Answer
View full question & answer→Correct option: B.
atmospheric pressure
b
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MCQ 21 Mark
Force acting on per unit area is called
- Anon-contact forces
- Bcontact forces
- Cforce
- ✓pressure
Answer
View full question & answer→Correct option: D.
pressure
d
MCQ 31 Mark
A ___________ exerted by an object on another is a force.
- ✓Push or pull
- BContact or non-contact force
- CPressure
- DMagnitude
Answer
View full question & answer→Correct option: A.
Push or pull
a
MCQ 41 Mark
The force exerted by the earth to pull the object towards itself is called
- Aelectrostatic force
- ✓gravitational force
- Cmuscular force
- Dcontact force
Answer
View full question & answer→Correct option: B.
gravitational force
b
MCQ 51 Mark
Muscular force is also called ___________ force.
- Anon-contact
- ✓contact
- Cgravitational
- Dmagnetic
Answer
View full question & answer→Correct option: B.
contact
b
MCQ 61 Mark
The force exerted by a charged body on another char
- Agravitational force
- ✓electrostatic force
- Cnon-contact force
- Dcontact force
Answer
View full question & answer→Correct option: B.
electrostatic force
b
MCQ 71 Mark
Force changes the
- Amotion of body
- Bspeed of body
- Cshape of body
- ✓all of these
Answer
View full question & answer→Correct option: D.
all of these
d
MCQ 81 Mark
The force exerted by our muscle is called
- Aelectrostatic force
- ✓muscular force
- Cgravitational force
- Dnon-contact force
Answer
View full question & answer→Correct option: B.
muscular force
b
MCQ 91 Mark
1 kilogram weight is equal to
- A98 N
- ✓9.8 N
- C0.98 N
- D0.098 N
Answer
View full question & answer→Correct option: B.
9.8 N
b
MCQ 101 Mark
A spring balance is used for measuring
- Amass
- ✓weight
- Cpressure
- Dspeed
Answer
View full question & answer→Correct option: B.
weight
b
MCQ 111 Mark
Two boys A and B are applying force on a block. If the block moves towards the boy A, which one of the following statements is correct?
- AMagnitude of force applied by A is greater than that of B.
- ✓Magnitude of force applied by A is smaller than that of B.
- CNet force on the block is towards B.
- DMagnitude of force applied by A is equal to that of B.
Answer
View full question & answer→Correct option: B.
Magnitude of force applied by A is smaller than that of B.
b
MCQ 121 Mark
When two forces act in opposite directions, then net force acting is the
- Asum of two forces
- ✓difference between two forces
- Cboth of these
- Dnone of these
Answer
View full question & answer→Correct option: B.
difference between two forces
b
MCQ 131 Mark
The strength of force is expressed by its
- Aweight
- Bmass
- ✓magnitude
- Dlongitudinal force
Answer
View full question & answer→Correct option: C.
magnitude
c
MCQ 141 Mark
Leaves fall down on the ground due to
- Aelectrostatic force
- Bmagnetic force
- ✓gravitational force
- Dmuscular force
Answer
View full question & answer→Correct option: C.
gravitational force
c
MCQ 151 Mark
State of motion is described by
- APosition of rest
- BPosition of motion
- ✓Both by the state of rest or motion
- DNone of these
Answer
View full question & answer→Correct option: C.
Both by the state of rest or motion
c
MCQ 161 Mark
When the hammer strikes the gong of an electric bell, which of the following force is responsible for the movement of hammer?
- AGravitational force alone
- BMagnetic force alone
- ✓Electrostatic force alone
- DFrictional force alone
Answer
View full question & answer→Correct option: C.
Electrostatic force alone
c
MCQ 171 Mark
During dry weather, while combing hair, sometimes we experience hair flying apart. The force respon¬sible for this is
- Aforce of gravity
- Bforce of friction
- ✓electrostatic force
- Dmagnetic force
Answer
View full question & answer→Correct option: C.
electrostatic force
c
MCQ 181 Mark
Two objects repel each other. This repulsion could be due to
- Africtional force only
- Belectrostatic force only
- Cmagnetic force only
- ✓either a magnetic or an electrostatic force
Answer
View full question & answer→Correct option: D.
either a magnetic or an electrostatic force
d
MCQ 191 Mark
Which one of the following forces is a contact force?
- AForce of gravity
- BMagnetic force
- ✓Force of friction
- DElectrostatic force
Answer
View full question & answer→Correct option: C.
Force of friction
c
MCQ 201 Mark
A push or pull on an object is called
- APressure
- BPush-pull
- ✓Force
- DAll of the above
Answer
View full question & answer→Correct option: C.
Force
c
MCQ 211 Mark
If two forces act in the opposite directions on an object, the net force acting on it is the
- ✓Sum of the two forces
- Bdifference between the two forces
- CMultiplication of the two forces
- DDivision of the two forces
Answer
View full question & answer→Correct option: A.
Sum of the two forces
a
MCQ 221 Mark
Which of the following is proper example(s) to explain that force on an object may change its shape
- AA ball of dough rolled into chapati
- BPressing a rubber ball kept on table
- CMaking model using clay
- ✓All of the above
Answer
View full question & answer→Correct option: D.
All of the above
d
MCQ 231 Mark
A ball rolling on the ground slows down and finally stops. This is because of
- AForce
- BLess force applied
- ✓Friction
- DNone of the above
Answer
View full question & answer→Correct option: C.
Friction
c
MCQ 241 Mark
Force of friction always acts on moving objects and its direction shall be ____
- AOn any direction
- BAlong the direction of motion
- ✓Perpendicular to the direction of motion
- DOpposite to the direction of motion
Answer
View full question & answer→Correct option: C.
Perpendicular to the direction of motion
c
MCQ 251 Mark
If In a tug-o-war, when two teams are pulling a rope, and the rope does not move towards any team, it implies that
- AEqual force is being applied in the same direction
- ✓Equal Force is being applied in opposite direction
- CNo force is applied in any direction
- DCannot be explained
Answer
View full question & answer→Correct option: B.
Equal Force is being applied in opposite direction
b
MCQ 261 Mark
An example of a non- contact force is
- AForce exerted by us to lift a bucket
- BPush a stationary car
- ✓Force exerted by magnet
- DHit a cricket ball for a 6 run
Answer
View full question & answer→Correct option: C.
Force exerted by magnet
c
MCQ 271 Mark
Pressure =
- AArea / force on which it acts
- ✓force / area on which it acts
- CVolume / force on which it acts
- DForce / volume on which it acts
Answer
View full question & answer→Correct option: B.
force / area on which it acts
b
MCQ 281 Mark
Gravity is
- ARepulsive
- BAttraction + Repulsive force
- ✓Attractive force
- DNot a force
Answer
View full question & answer→Correct option: C.
Attractive force
c
MCQ 291 Mark
A batsman hits the ball for a boundary past the bowler i.e. four runs. The batsman thus
- ✓Changes the direction & speed of the ball
- BDoes not change the direction but speed only
- CDoes not change the speed but direction only
- DDoes not change either direction or speed
Answer
View full question & answer→Correct option: A.
Changes the direction & speed of the ball
a
MCQ 301 Mark
The net force on an object is zero if the two forces act on it in
- ✓Opposite direction
- BSame direction
- CSometimes opposite and sometimes in same direction.
- DAll of the above.
Answer
View full question & answer→Correct option: A.
Opposite direction
Opposite direction
MCQ 311 Mark
Which one of the following forces is a contact force?
- AForce of gravity
- BMagnetic force
- ✓Force of friction
- DElectrostatic force
Answer
View full question & answer→Correct option: C.
Force of friction
Force of friction
MCQ 321 Mark
The force between two charged bodies is called?
- AMuscular force
- BGravitational force
- CMagnetic force
- ✓Electrostatic force
Answer
View full question & answer→Correct option: D.
Electrostatic force
Electrostatic force
MCQ 331 Mark
In the circuit shown in Figure when the circuit is completed, the hammer strikes the gong. Which of the following force is responsible for the movement of hammer?
- AGravitational force alone.
- BMagnetic force alone.
- ✓Electrostatic force alone.
- DFrictional force alone.
Answer
View full question & answer→Correct option: C.
Electrostatic force alone.
It will be magnetic force because as electric current flows through the coil, it behaves like electromagnet and magnetic force is created.
MCQ 341 Mark
Does a falling body accelerate? Why?
- ✓Yes, because the gravity is a force that causes it to move faster.
- BNo, because the gravity is a force that causes it to move at constant speed.
- CYes, because the air causes it to accelerate.
- DNo, because air keeps it moving at constant speed.
Answer
View full question & answer→Correct option: A.
Yes, because the gravity is a force that causes it to move faster.
Yes, because the gravity is a force that causes it to move faster.
MCQ 351 Mark
Tyres of vehicles have grooves on their surface:
- ATo reduce the cost of material used.
- ✓Increase friction.
- CDecrease friction.
- DMake them attractive.
Answer
View full question & answer→Correct option: B.
Increase friction.
Increase friction.
MCQ 361 Mark
Which of the following is not a non-contact force?
- AElectrostatic force.
- ✓Gravitational force.
- CFrictional force.
- DMagnetic force.
Answer
View full question & answer→Correct option: B.
Gravitational force.
Friction force is an example of contact force.
MCQ 371 Mark
How does the pressure exerted by a liquid change?
- ✓Increases with depth
- BDecreases with depth
- CRemains constant
- DFirst increases and then decreases
Answer
View full question & answer→Correct option: A.
Increases with depth
Increases with depth
MCQ 381 Mark
A water tank has four taps fixed at points $A, B, C, D$ as shown in Figure The water will flow out at the same pressure from taps at:
- ✓$B$ and $C$
- B$C$ and $D$
- C$A$ and $B$
- D$A$ and $C$
Answer
View full question & answer→Correct option: A.
$B$ and $C$
Since, $B$ and $C$ are at the same level. So, the pressure will remain same at $B$ and $C$.
MCQ 391 Mark
The unit of pressure is:
- ANewton
- ✓Newton/metres
- CNewton metres
- DNewton/metre
Answer
View full question & answer→Correct option: B.
Newton/metres
The unit of pressure is Newton/metres.
MCQ 401 Mark
A rectangular wooden block has length, breadth and height of $50\ cm, 25\ cm$ and $10\ cm,$ respectively. This wooden block is kept on ground in three different ways, turn by turn. Which of the following is the correct statement about the pressure exerted by this block on the ground?
- AThe maximum pressure is exerted when the length and breadth form the base.
- BThe maximum pressure is exerted when length and height form the base.
- ✓The maximum pressure is exerted when breadth and height form the base.
- DThe minimum pressure is exerted when length and height form the base.
Answer
View full question & answer→Correct option: C.
The maximum pressure is exerted when breadth and height form the base.
As we know that pressure exerted by the body is inversely proportional to the area where force is applied.
So, which has less area of cross section in contact with the surface will exert more pressure on the ground.
It is clear that height from the base exerts more pressure.
Therefore, the maximum pressure is exerted when length and height form the base.
So, which has less area of cross section in contact with the surface will exert more pressure on the ground.
It is clear that height from the base exerts more pressure.
Therefore, the maximum pressure is exerted when length and height form the base.
MCQ 411 Mark
The force exerted by a charged body on another char:
- AGravitational force
- ✓Electrostatic force
- CNon-contact force
- DContact force
Answer
View full question & answer→Correct option: B.
Electrostatic force
Electrostatic force
MCQ 421 Mark
In the electric bell circuit, when the circuit is completed, the hammer strikes the gong. Which of the following force is responsible for the movement of hammer?
- AGravitational force alone
- BElectrostatic force alone
- ✓Magnetic force alone
- DFrictional force alone
Answer
View full question & answer→Correct option: C.
Magnetic force alone
It will be magnetic force because as electric current flows through the coil, it behaves like electromagnet and magnetic force is created.
MCQ 431 Mark
The pressure of the water at the bottom of the pond is $.....$ at the surface of the pond.
- ALower than
- ✓Higher than.
- CSame
- DEither lower or higher.
Answer
View full question & answer→Correct option: B.
Higher than.
Higher than.
MCQ 441 Mark
Fill in the blank.
A rubber balloon $......$ when the molecules of air exert force on its walls.
A rubber balloon $......$ when the molecules of air exert force on its walls.
- ✓Expands
- BContracts
- CNo change in dimension is seen
- DAll of the above
Answer
View full question & answer→Correct option: A.
Expands
Force can bring change in dimension.A rubber balloon expands when the molecules of air exert force on its walls.
MCQ 451 Mark
Which of the following change appreciably when a batsman hits a moving cricket ball?
- AShape and direction.
- BDirection and size.
- CShape and size.
- ✓Direction and speed.
Answer
View full question & answer→Correct option: D.
Direction and speed.
A force can change the speed of a moving object. A force can change the direction of a moving object. A force can change the composition of a moving object. A force can change the shape and size of an object. But when a batsman hits a moving cricket ball, its direction and speed changed, not shape and size.
MCQ 461 Mark
Force per unit area is called $....$
- AMotion
- BGravity
- ✓Pressure
- DFriction
Answer
View full question & answer→Correct option: C.
Pressure
Pressure
MCQ 471 Mark
A stone thrown with a catapult $($Gulal$)$ falls back on the ground because :
- AThe muscles apply force
- BThe stone applies force
- ✓The earth exerts force
- DThe catapult exerts force
Answer
View full question & answer→Correct option: C.
The earth exerts force
A stone thrown with a catapult $($Gulal$)$ falls back on the ground because the earth exerts force
on it
on it
MCQ 481 Mark
The below figures show the forces required to move a $100g$ object over different surfaces. The friction is greatest at:
- ✓Surface $P$
- BSurface $Q$
- CSurface $R$
- DSurface $S$
Answer
View full question & answer→Correct option: A.
Surface $P$
The force required to move a $100g$ mass on surface $P$ is maximum.
This means surface $P$ offers maximum friction.
This means surface $P$ offers maximum friction.
MCQ 491 Mark
During dry weather, while combing hair, sometimes we experience hair flying apart. The force responsible for this is:
- AForce of gravity.
- ✓Electrostatic force.
- CForce of friction.
- DMagnetic force
Answer
View full question & answer→Correct option: B.
Electrostatic force.
The electrostatic force is responsible for it, since on comparing the hair, the comb and hair get oppositely charged.
MCQ 501 Mark
Which of the following are contact forces?
$(A).$ Friction.
$(B).$ Gravitational force.
$(C).$ Magnetic force.
$(D).$ Muscular force.
$(A).$ Friction.
$(B).$ Gravitational force.
$(C).$ Magnetic force.
$(D).$ Muscular force.
- A$A$ and $B$
- B$B$ and $C$
- ✓$A$ and $D$
- D$B$ and $D$
Answer
View full question & answer→Correct option: C.
$A$ and $D$
Force applied when it is in contact with the object.