WorksheetsPhysics Quiz on Forces and Pressure
Total questions: 100
Worksheet time: 50mins
A man pushes a wall with a force of 200 N, but the wall does not move. Which of the following is true?
Work is done because force is applied
No force is applied, so no work is done
Force is applied, but no work is done because there is no displacement
Work is done in the opposite direction
Two children push a box from opposite sides with equal force. The box does not move. What can be said about the forces acting on the box?
The forces cancel each other, so net force is zero
The net force is equal to the force of one child
The box moves slightly and then stops
The forces add up to double the force of one child
A needle has a sharp tip and a nail has a blunt end. Why does the needle pierce cloth more easily than the nail?
Needle is made of softer material
Needle exerts less pressure due to small area
Needle exerts more pressure due to smaller area
Nail is heavier than the needle
A person is standing on snow and sinks, but when lying down, they do not. This is because:
Lying down reduces body weight
Standing increases the strength of gravity
Pressure is less when lying down because area increases
Pressure increases due to more contact with snow
Why do astronauts need to wear special suits in space?
To protect from UV rays only
Because gravity is stronger in space
To maintain body pressure due to the vacuum in space
To reduce body weight
Why do liquids and gases exert pressure in all directions?
Because they are lighter than solids
Because their particles are closely packed
Because their particles can move freely in all directions
Because they have fixed shape and volume
When you increase the area over which a force is applied, what happens to the pressure?
Pressure increases
Pressure stays the same
Pressure decreases
Pressure becomes zero
Why are foundations of dams made wider at the bottom?
To make the dam look strong
To reduce pressure from water at the bottom
To increase pressure exerted by water
To bear the high pressure exerted by water at greater depth
Which of the following situations shows an unbalanced force?
A ball rolling at constant speed on a smooth surface
A book lying on a table
A person kicking a stationary football
Two people pushing a door with equal force from opposite sides
Which of the following statements is true about pressure in liquids?
Pressure increases as we move up in the liquid
Pressure is the same at all depths
Pressure is greater at the surface
Pressure increases with depth
You are standing in a swimming pool. At which part of your body will water pressure be the highest?
Head
Neck
Chest
Feet
What will happen to the pressure if the same force is applied on a smaller area?
It will remain the same
It will increase
It will decrease
It will become zero
Why do drawing pins have a flat head and a sharp point?
To look attractive
To reduce force needed to push
To increase pressure at the point and reduce pressure on finger
To increase pressure at both ends
Which of these is NOT a result of pressure in gases?
Balloon inflates when filled with air
Air rushes out of a tyre when punctured
A vacuum flask keeps liquids hot
A syringe draws in liquid when plunger is pulled
What is the direction of pressure exerted by a liquid in a container?
Only downward
Only sideways
Downward and upward only
In all directions
Which of the following is the action-at-distance force?
muscular force
frictional force
magnetic force
mechanical force
The force exerted by one object on another by virtue of their masses is
magnetic force
electrostatic force
gravitational force
frictional force
The standard unit of force is
metre/second
newton
metre/second2
gram-weight
A spring balance is used for measuring
weight
speed
acceleration
mass
A force applied on a moving body may
bring it to rest
increase its speed
decrease the speed
all of the above
Earth always pulls everything towards it due to
muscular force
mechanical force
gravitational force
electrostatic force
A cart being carried by a horse is an example of
muscular force
mechanical force
gravitational force
electrostatic force
If you press an inflated balloon, it deforms due to a type of
contact force
non-contact force
gravitational force
none of these
Force exerted by the muscles is known as
mechanical force
gravitational force
electrostatic force
muscular force
A hockey player uses his hockey stick -
To push the ball
To pull the ball
To change its direction
All of these
A force when applied brings change in -
Direction of motion of the body
Speed of moving body
Shape of the body
Any of these
The force responsible for the wearing out of the car tyres is -
Frictional force
Gravitational force
Magnetic force
Muscular force
The force you will use to collect the iron nails scattered on a sandy ground is -
Frictional force
Gravitational force
Magnetic force
None of these
The force you use to stretch a rubber band is -
Frictional force
Gravitational force
Magnetic force
Muscular force
The SI unit of force is
metre
newton
pascal
second
A contact force cannot act through
empty space
touching
touching with a metal rod
touching with a wooden rod
A force that opposes the motion of one surface sliding over another is called
friction
newton
lubrication
ball bearing
If a given force is applied on a smaller area of contact the pressure exerted by it
decreases
increases
does not change
none of these
A camel can walk/run in deserts very easily as compared to horse, donkey etc., because is -
feet are smaller
weight is lesser
feet are broader
heavier body
The SI unit of pressure is
atmosphere
pascal
cm of mercury
mm of mercury
Pressure is defined as
force
force × distance
force per unit area
force × area
Pressure can be measured in the units of .............
Newton/m2
Pascal
Both A & B
none of these
With the depth of a liquid, exerted pressure......
decreases
ceases
increases
no change
At high altitudes the air pressure is ..... than at sea level
less
more
same
can't say
The substances that do not have a fixed shape and can flow are commonly called....
Gases
Liquids
both (A) and (B)
none of these
The pressure applied on a body depends on
Force
Mass
Both force and mass
Both force and area
You have two nails, one with sharp end and other with blunt end. If you apply equal force on each, the nail that will be hammered first will be
The nail with pointed
The nail with blunt end
Both will be hammered in same time
None of these can be hammered
The formula for pressure is
force × area
force / area
Area / force
none of these
A body starts sliding over a horizontal surface with an initial velocity of 0.5 m/s. Due to friction, its velocity decreases at the rate of 0.05 m/s². How much time does it take to stop?
10 s
20 s
25 s
5 s
If a body is at rest on the surface of the earth then which of the following statement is correct?
No force is acting on the body.
Only weight of the body acts on it.
Net downward force is equal to the net upward force.
None of these
An object with mass 2 kg moves with a velocity of 10 m/s. What is the net force on the body?
20 N
0 N
5 N
20 N
A cube of side 0.2 m rests on the floor, as shown. Given that the cube has a mass of 50 kg, the pressure exerted by the cube on the floor is __________.
25 N m⁻²
250 N m⁻²
1250 N m⁻²
12500 N m⁻²
A wooden block is placed on a table. It exerts a force of 80 N on the table. If the base area of the block is 2 m² then what will be the pressure on the table?
160 Pa
80 Pa
40 Pa
240 Pa
When we press the bulb of a dropper with its nozzle kept in water, air in the dropper is seen to escape in the form of bubbles. Once we release the pressure on the bulb, water gets filled in the dropper. The raise of water in the dropper is due to
Pressure of water
gravity of earth
shape of bulb
atmospheric pressure
The pressure of the water near the bottom of the wall forming a dam does not depend on.
The depth of the water
The cross-sectional area of the reservoir
Density of water
Atmospheric pressure
A force of 10 N acts upon a body of mass 2 kg. Calculate the acceleration.
10 m/s²
5 m/s²
15 m/s²
7.5 m/s²
Find the acceleration produced by a force of 5 N acting on a mass of 10 kg.
5 m/s²
0.5 m/s²
0.05 m/s²
50 m/s²
A body of mass 3 kg retards uniformly from 40 m/s to 10 m/s in 10 s. Find the retarding force.
9 N
3 N
10 N
6 N
Calculate the momentum of a ball of mass 450g moving with a speed of 120 km/h.
10 kgm/s
15 kgm/s
45 kgm/s
25 kgm/s
A body weighing 5 kg moves with a velocity of 10 m/s to 50 m/s. Calculate the change in its momentum.
100 kgm/s
150 kgm/s
200 kgm/s
250 kgm/s
A body of mass 500 g is resting on frictionless table. Calculate the acceleration of the body when acted upon by a force of 0.01 N.
0.04 m/s²
0.02 m/s²
0.08 m/s²
0.06 m/s²
A certain force applied to a body A gives it an acceleration of 10 m/s². The same force applied to body B gives it an acceleration of 15 m/s². If the bodies are joined together and the same force is applied to the combination, the acceleration will be
6 m/s²
2.5 m/s²
12.5 m/s²
9 m/s²
A statue exerts a pressure of 340 Pa on the floor. What is the weight of the statue if base area of its one foot is 17 cm²?
0.5780 N
1000 N
1.156 N
2000 N
Which force is involved in the following situations? Hammering a nail into the wall, Cutting vegetables and fruits, Bullocks ploughing the field.
Gravitational force
Muscular force
Electric force
Magnetic force
Two blocks of masses m₁ and m₂ are lying on a frictionless horizontal table connected by a massless string. Body of mass m₁ is pulled by horizontal force F. Acceleration produced is
F/m₁
F/m₂
F/(m₁+m₂)
F/(m₁-m₂)
If no force acts on a body, it will either
move with increased speed
move with decreased speed
change its direction of motion
either remain at rest or move in a straight line
When a force is applied to a stationary object, several effects are possible. Which of the following effect is not possible?
The object moves
The object rotates
The object remains stationary
The mass of the object increases
A toy car is released from point X of the ramp and travels towards point Y. What is/are the forces responsible for pulling the car towards point Y?
Weight of the car.
Earth's magnetic field.
Frictional force between the wheels and the ramp.
In a game of tug-o-war. Mark pulls the rope with a force of 60 N from the right. Sandy and George pull the rope with respective forces of 40 N and 20 N from the left, as shown in the given figure. The net force on the rope is
0 N
2 N
60 N
120 N
A trolley is moving at a constant speed of 2 m/s. Cole and Paul start pushing the trolley at the same time from opposite directions, as shown in the figure. Both of them are applying a force of 15 N on the trolley. The speed of the trolley will
remain the same
become zero
decrease
increase
Assertion: There is high atmospheric pressure in space. Reason: Astronauts wear special suits.
Both A and R are true, and R is the correct explanation of A.
Both A and R are true, but R is not the correct explanation of A.
A is true but R is false.
A is false but R is true.
Assertion: Fluid exerts pressure on the walls of the container. Reason: Fluids have definite shapes and sizes.
Both A and R are true, and R is the correct explanation of A.
Both A and R are true, but R is not the correct explanation of A.
A is true but R is false.
A is false but R is true.
If both containers have the same shape, same size and are kept at the same surface but the height from the ground h₁ > h₂. Which container will have more pressure?
Same in A and B
Container B
Container A
None of these
Which of the following is/are the unit(s) of force?
Dyne
Kg-force (kg-f)
Newton
All of these
Which is not the effect of force?
Change in position of rest
Change in position of motion
Change in mass
Change in shape
A force is applied to an object in the direction of its motion. What is the effect of force on the object?
The speed of the object will increase.
The speed of the object will decrease.
The speed of the object will remain unchanged.
The object comes to rest
Frictional force is applied in the direction of
Downwards
The object
Opposite to the object
All of the above.
Select the situations where we push things to change the state.
Moving a heavy log by an elephant
Moving a table from one room to another
Moving a motorcycle with empty petrol tank
Both b. and c. are correct.
A porter ties a cloth around his head while carrying the load. The intention of this action would be
To reduce the pressure
To increase the supporting area
To decrease the supporting area
Both a. and b. are correct.
Force may change the direction of moving objects. Which of the following is an example of this statement?
Hitting with hammer on an aluminium vessel
Bouncing of a ball after hitting on a wall
Catching a cricket ball
Kicking a football
A plastic straw rubbed with a synthetic cloth attracts a plastic straw but if both are rubbed with a synthetic cloth, they repel each other. The reason is
The straws attain opposite charges while rubbing with synthetic cloth
The straws attain same charge while rubbing with synthetic cloth
The straw which is not rubbed with synthetic cloth has opposite charge
Question does not provide sufficient information or is vague.
Akshay showed a magic to the class. He rubbed his plastic scale on his sweater and brought it near some bits of paper. The paper bits stuck to the plastic scale. When the students told their science teacher about this, she explained them the reason. The reason would be
Electrostatic force is responsible for the attraction between the scale and paper bits.
Electrostatic force is developed by rubbing plastic and wool
Question does not provide sufficient information or is vague.
Both a. and b. are correct.
Pick out the examples where force is used to push the object.
Kicking a football
Moving a cart
Drawing water from a well
Opening a door from inside the room
It is easy to cut vegetables using a sharp knife than a blunt one. The reason behind this statement is
The cutting edge of a sharp knife has less area than the blunt knife
The cutting edge of a blunt knife has less area than the sharp knife
A sharp knife applies more pressure on the vegetables than the blunt one
Question does not provide sufficient information or is vague.
A boy is crushing a disposable bottle. Here the effect of the force is
Change in state
Change in position
Change in shape
Question does not provide sufficient information or is vague.
Force may start motion in objects. Which of the following is an example of this statement?
Kicking a football
Hitting with hammer on an aluminium vessel
Kicking a moving ball
Catching a cricket ball
When an aeroplane moves forward, the force acting on it to reduce the speed is
Gravity
Friction of air
Atmospheric pressure
All of the above.
One Pascal is equal to
1kg/m2
1N/m2
1Nm2
1kgm2
The force with which earth attracts all the objects towards its centre. This force is called
Magnetic force
Gravity
Electrostatic force
Friction
Identify the type of force applied in this case: A boy squeezes a plastic bottle with his hands.
Mechanical force
Contact force
Muscular force
Gravity
Atmospheric pressure is experienced on us but we do not feel it. This is because
As the surface area of our body is comparatively larger than the atmospheric pressure, we do not experience it
It gets neutralised by gravity
Pressure inside our body is equal to atmospheric pressure
Question does not provide sufficient information or is vague.
Force is measured in
Newton/Meter2
Newton
Newton Meter
None of the above.
Force may accelerate the movement of objects. Which of the following is an example of this statement?
Hitting with hammer on an aluminium vessel
Kicking a moving ball
Kicking a football
Catching a cricket ball
A force which can produce its effect without direct contact with object is called
Non-contact force
Contact force
Muscular force
Electrostatic force
Magnetic force is
Non-contact force
Contact force
Question does not provide sufficient information or is vague.
All of the above.
Assertion (A): Liquids exert more pressure at greater depths. Reason (R): The weight of the liquid above a point increases with depth.
Both A and R are true, and R is the correct explanation of A.
Both A and R are true, but R is not the correct explanation of A.
A is true, but R is false.
A is false, but R is true.
Assertion (A): Force can change the shape of an object. Reason (R): Force always increases the weight of an object.
Both A and R are true, and R is the correct explanation of A.
Both A and R are true, but R is not the correct explanation of A.
A is true, but R is false.
A is false, but R is true.
Assertion (A): A sharp knife cuts better than a blunt one. Reason (R): A sharp knife has less area at the edge, which increases the pressure.
Both A and R are true, and R is the correct explanation of A.
Both A and R are true, but R is not the correct explanation of A.
A is true, but R is false.
A is false, but R is true.
Assertion (A): When you blow air into a balloon, it expands. Reason (R): Gases exert pressure on the walls of the container.
Both A and R are true, and R is the correct explanation of A.
Both A and R are true, but R is not the correct explanation of A.
A is true, but R is false.
A is false, but R is true.
Assertion (A): A boy standing on one foot exerts more pressure than when standing on both feet. Reason (R): Pressure increases when the area over which the force acts decreases.
Both A and R are true, and R is the correct explanation of A.
Both A and R are true, but R is not the correct explanation of A.
A is true, but R is false.
A is false, but R is true.
Assertion (A): Liquids and gases can flow but solids cannot. Reason (R): Solids exert pressure in all directions.
Both A and R are true, and R is the correct explanation of A.
Both A and R are true, but R is not the correct explanation of A.
A is true, but R is false.
A is false, but R is true.
Assertion (A): A dam is thicker at the bottom than at the top. Reason (R): Pressure exerted by a liquid increases with depth.
Both A and R are true, and R is the correct explanation of A.
Both A and R are true, but R is not the correct explanation of A.
A is true, but R is false.
A is false, but R is true.
Assertion (A): When a syringe plunger is pulled up, liquid enters the syringe. Reason (R): The pressure inside the syringe becomes less than the pressure outside.
Both A and R are true, and R is the correct explanation of A.
Both A and R are true, but R is not the correct explanation of A.
A is true, but R is false.
A is false, but R is true.
Assertion (A): A brick kept on its widest face exerts less pressure than when kept on its edge. Reason (R): Increasing the area of contact decreases pressure for the same force.
Both A and R are true, and R is the correct explanation of A.
Both A and R are true, but R is not the correct explanation of A.
A is true, but R is false.
A is false, but R is true.
Assertion (A): Balanced forces can move a body. Reason (R): Balanced forces do not change the state of motion of an object.
Both A and R are true, and R is the correct explanation of A.
Both A and R are true, but R is not the correct explanation of A.
A is true, but R is false.
A is false, but R is true.
