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question_answer1)
Which of the following actions describe pushing force?
A)
Kicking done
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B)
Lifting done
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C)
Picking done
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D)
Opening done
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question_answer2)
Which of the following is NOT a force?
A)
Muscular done
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B)
Magnetic done
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C)
Chemical done
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D)
Electric done
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question_answer3)
A force is applied on an object in the direction of its motion. What is the effect of force on the object?
A)
The speed of the object will increase. done
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B)
The speed of the object will decrease. done
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C)
The speed of the object will remain unchanged. done
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D)
The object comes to rest. done
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question_answer4)
If no force acts on a body at rest, then what effect can be observed?
A)
The body changes shape. done
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B)
The body moves with increased speed. done
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C)
The body remains at rest. done
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D)
The body breaks up. done
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question_answer5)
Which of the following examples describe the change of shape on applying force?
A)
A ball being kicked done
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B)
A fan switched on done
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C)
A man jumping from a height done
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D)
Repeatedly tearing of a paper done
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question_answer6)
Which of the following effects is caused by frictional force?
A)
Change in the shape of an object done
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B)
Change in the direction of the motion of an object done
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C)
Slowing down of a moving object done
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D)
Acceleration in a moving body done
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question_answer7)
Which of the following is a non-contact force?
A)
Muscular force done
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B)
Electrostatic force done
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C)
Elastic spring force done
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D)
Frictional force done
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question_answer8)
What causes the atmospheric pressure?
A)
The sky above our head done
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B)
The air surrounding the earth done
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C)
The gravitational force of the sun and other planets done
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D)
The mass of the earth done
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question_answer9)
How does the pressure exerted by a liquid change?
A)
Increases with depth done
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B)
Decreases with depth done
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C)
Remains constant done
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D)
First increases and then decreases done
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question_answer10)
What is thrust equal to?
A)
Force\[\times \]area done
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B)
Force/area done
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C)
Pressure done
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D)
Pressure\[\times \]area done
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question_answer11)
A When does a body float on water?
A)
When no force is acting on it. done
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B)
When the net force acting on the body is zero done
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C)
When there is a gravitational pull. done
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D)
When there is friction between the body and the water done
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question_answer12)
In which of the following cases the net force is NOT equal to zero?
A)
A kite held stationary in the sky. done
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B)
A ball falling freely from a height. done
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C)
A helicopter hovering above the ground. done
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D)
A cork floating on the surface of water. done
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question_answer13)
We use a straw (narrow pipe) to drink juice from a glass. What make this possible?
A)
The volume of liquid done
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B)
The atmospheric pressure done
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C)
The gravitational pull done
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D)
All of the above done
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question_answer14)
Which of the following effects is NOT caused by the magnetic force between a magnet and a magnetic substance?
A)
Change of state done
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B)
Change of shape done
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C)
Change of size done
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D)
Change of chemical composition done
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question_answer15)
In cities, water from an overhead tank is supplied to houses using the principle of
(i) difference in pressure. |
(ii) gravitational force. |
(iii) decrease of friction m pipes. |
A)
Only (i) done
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B)
Only (i) and (ii) done
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C)
Only (ii) and (iii) done
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D)
(i), (ii) and (iii) done
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question_answer16)
A deep sea diver's ears get hurt when he is inside the water. What is the cause for it?
A)
Lack of oxygen done
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B)
Decrease in atmospheric pressure done
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C)
Increase in water pressure done
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D)
All of the above done
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question_answer17)
What does a barometer measure?
A)
Liquid pressure done
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B)
Thrust done
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C)
Atmospheric pressure done
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D)
Air temperature done
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question_answer18)
Four forces are acting on a body. If the body does not change its position or shape/then what does it mean?
A)
Forces are similar acting in the same direction. done
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B)
Forces are parallel and opposite. done
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C)
Forces add up to zero when taken as vectors. done
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D)
Forces are different acting in the same direction. done
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question_answer19)
Why do deep sea divers use a special suit for diving?
A)
To maintain their body temperature in cold sea water done
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B)
To protect against sea animals done
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C)
To counter balance the pressure in the sea. done
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D)
To keep them dry done
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question_answer20)
On what factors does the magnitude of non-contact force depend?
A)
Distance between two bodies done
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B)
Mass of the two bodies done
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C)
Chemical composition of the two bodies done
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D)
All of the above done
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question_answer21)
Why does a rubber sucker stick to a surface?
A)
It is the inherent property of rubber. done
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B)
Gravitational force acts on it. done
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C)
Elastic spring force acts on it. done
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D)
Atmospheric pressure acts on it. done
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question_answer22)
Which force does an archer use to pull a bow?
A)
Muscular force done
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B)
Magnetic force done
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C)
Gravitational force done
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D)
All of the above done
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question_answer23)
A player slides a bowling ball on the lane to hit the pins. What is the effect of the force exerted on the bowling ball?
A)
Stops the moving bowling ball done
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B)
Changes the direction of the moving bowling ball done
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C)
Changes the shape of the moving bowling ball done
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D)
Changes the position of the stationary pins done
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question_answer24)
Which of the following requires a pushing force?
A)
Throwing a stone done
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B)
Grabbing hold of a pencil done
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C)
Leaves falling from a tree done
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D)
A load lifted by a pulley done
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question_answer25)
Identify the application of low pressure in everyday life.
A)
Wide tyres of a heavy vehicle done
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B)
Cutting of an apple with a sharp knife done
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C)
Hammering of a nail into wood done
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D)
All of the above done
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question_answer26)
Which of the following does NOT require a force?
A)
Rowing of a boat done
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B)
Bursting of a balloon filled with lots of air. done
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C)
Pedalling a cycle done
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D)
Catching a moving cricket ball done
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question_answer27)
Which of the following is true of the man in the picture shown below?
A)
He is applying force on the stool. done
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B)
He represents only magnitude but no direction. done
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C)
He is not applying any force on the stool. done
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D)
The gravitational pull of earth on the stool is greater. done
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question_answer28)
Which of the following statements about the moon is NOT correct?
A)
The moon orbits the earth keeping the same side facing us. done
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B)
The gravitational pull of the moon causes high tides in oceans. done
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C)
The craters on the moon caused long ago still exist because the moon has no atmosphere. done
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D)
The sun lights up the complete moon at any one time. done
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question_answer29)
A book remains at rest on a table. Why?
A)
No force acts on it. done
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B)
There is friction between the book and the surface of the table. done
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C)
Force exerted by the book on the table is the same as the force exerted by the table on the book. done
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D)
All of the above done
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question_answer30)
How is the weight of an astronaut in the outer space in relation with his actual weight?
A)
It is less than his actual weight. done
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B)
It is more than his actual weight. done
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C)
It is the same as his actual weight. done
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D)
It is zero. done
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question_answer31)
Why is the atmospheric pressure not felt by us?
A)
It is small in magnitude. done
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B)
It acts only-on atmosphere and not on us. done
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C)
Our internal body pressure is equal to that of the atmospheric pressure. done
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D)
It does not act at sea level. done
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question_answer32)
A The speed of a falling body increases continuously. Why?
A)
No force acts on the falling body. done
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B)
The falling body is very light. done
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C)
Air exerts a frictional force on the falling body. done
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D)
The force acting on the body is in the direction of the fall. done
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question_answer33)
Look at the block placed on the table given below:
Which of the following physical quantities is not the same when this block is kept over a table with its different faces touching the table?
A)
Pressure done
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B)
Volume done
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C)
Weight done
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D)
Mass done
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question_answer34)
Arrange the given pictures in ascending Br order according to the air pressure at the highest point in each case.
A)
(i), (ii), (iii) done
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B)
(ii), (iii), (i) done
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C)
(ii), (i), (iii) done
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D)
(iii), (ii), (i) done
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question_answer35)
A spirit level is used to determine the surface level as shown in the figure below. Position of the air bubble
Why does the air bubble at the centre of the tube move to the right when the surface is inclined?
A)
The forces acting on the air bubble are in equilibrium. done
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B)
Unbalanced forces act on the air bubble. done
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C)
Air bubbles always rise. done
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D)
Frictional force act on the air bubble. done
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