Live Education Quiz

1

What is meant by the resultant force?

A Force that stops motion B Single force having same effect as multiple forces C Force due to gravity only D Force applied by an object

2

If all forces acting on a body cancel each other, the resultant force is:

A Maximum B Minimum C Zero D Infinite

3

Newton’s Second Law of Motion relates force with:

A Velocity B Momentum C Acceleration D Distance

4

The mathematical form of Newton’s Second Law is:

A F = mv B F = ma C F = m/a D F = a/m

5

Unit of force in SI system is:

A Dyne B Joule C Newton D Watt

6

If mass of a body is doubled and force remains same, acceleration will:

A Double B Become half C Remain same D Become zero

7

Newton’s Third Law of Motion states that:

A Force equals mass times acceleration B Every action has an equal and opposite reaction C Body remains at rest or in motion D Momentum is conserved

8

Action and reaction forces act on:

A Same body B Different bodies C Same direction D Same surface

9

Which of the following is an example of action-reaction pair?

A Weight and mass B Push on wall and wall pushing back C Friction and gravity D Speed and velocity

10

Why does a gun recoil when a bullet is fired?

A Due to gravity B Due to friction C Due to Newton’s Third Law D Due to inertia

11

Which law explains motion of rockets?

A First law B Second law C Third law D Law of gravitation

12

Momentum of a body depends on:

A Mass only B Velocity only C Mass and velocity D Force and mass

13

Formula of momentum is:

A p = mv B p = ma C p = m/v D p = v/m

14

SI unit of momentum is:

A kg m s⁻¹ B kg m s⁻² C N s⁻¹ D J s

15

Impulse is equal to:

A Force × distance B Force × time C Mass × acceleration D Momentum ÷ time

16

Impulse is equal to change in:

A Force B Velocity C Momentum D Mass

17

Unit of impulse is:

A Newton B Newton second C Joule D Watt

18

Which of the following increases impulse?

A Decreasing time B Increasing time C Decreasing force D Decreasing momentum

19

Why are airbags used in cars?

A To increase speed B To decrease force by increasing time C To reduce mass D To stop motion instantly

20

Principle of conservation of momentum states that:

A Momentum always increases B Momentum is lost in collisions C Total momentum remains constant D Momentum depends on force

21

What happens to the shape of a body when a force is applied?

A It always breaks B It may change C It becomes heavier D It stops moving

22

What is deformation?

A Change in mass B Change in volume only C Change in shape or size D Change in temperature

23

Which force can change the size of a body?

A Balanced force B Applied force C Gravitational force only D Magnetic force only

24

Elasticity is the property of a material to:

A Break easily B Change color C Regain original shape D Increase mass

25

Which material shows elasticity?

A Clay B Rubber band C Wet mud D Butter

26

Hooke’s Law is valid up to:

A Breaking point B Elastic limit C Melting point D Yield point

27

According to Hooke’s Law, force is proportional to:

A Mass B Pressure C Extension D Area

28

What is the spring constant?

A Force per unit mass B Extension per unit force C Force per unit extension D Area per unit force

29

The unit of spring constant is:

A Newton B Newton per meter C Meter D Pascal

30

A stiffer spring has:

A Smaller spring constant B Zero spring constant C Larger spring constant D Negative spring constant

31

In a load-extension graph, the straight line shows:

A Breaking point B Elastic behavior C Plastic behavior D Failure point

32

The limit of proportionality is the point where:

A Graph becomes horizontal B Extension stops C Force is zero D Graph stops being straight

33

Beyond elastic limit, a material:

A Returns to original shape B Shows permanent deformation C Becomes rigid D Stops stretching

34

What is pressure?

A Force × area B Force / area C Area / force D Mass × force

35

The SI unit of pressure is:

A Newton B Joule C Pascal D Watt

36

Pressure increases when:

A Force decreases B Area increases C Area decreases D Mass decreases

37

Why do sharp knives cut better?

A They have more mass B They reduce force C They increase pressure D They reduce friction

38

Atmospheric pressure is due to:

A Weight of water B Weight of air C Earth’s rotation D Sun’s heat

39

Atmospheric pressure decreases with:

A Depth B Temperature C Height D Humidity

40

Why is atmospheric pressure lower on mountains?

A More air B Less air above C More gravity D Higher temperature

41

Which instrument measures atmospheric pressure?

A Manometer B Thermometer C Barometer D Hygrometer

42

The working liquid in a mercury barometer is:

A Water B Oil C Mercury D Alcohol

43

Standard atmospheric pressure is equal to:

A 76 cm of mercury B 10 cm of mercury C 1 cm of mercury D 760 cm of mercury

44

A manometer is used to measure:

A Atmospheric pressure only B Liquid pressure only C Gas pressure D Temperature

45

Liquid pressure depends on:

A Shape of container B Depth of liquid C Color of liquid D Area of container

46

Liquid pressure increases with:

A Height B Density C Depth D All of these

47

Which liquid produces more pressure at same depth?

A Water B Oil C Mercury D Alcohol

48

Pascal’s Law states that pressure applied to a confined liquid:

A Acts upward only B Acts downward only C Is transmitted equally D Is reduced

49

Hydraulic machines work on:

A Hooke’s Law B Pascal’s Law C Archimedes’ Principle D Newton’s Law

50

Which is an application of Pascal’s Law?

A Barometer B Hydraulic lift C Thermometer D Speedometer

51

Why do camels have wide feet?

A To run fast B To increase pressure C To decrease pressure D To reduce weight

52

Pressure at the bottom of a lake is:

A Zero B Less than surface C More than surface D Equal to surface

53

Which factor does not affect liquid pressure?

A Depth B Density C Shape of container D Gravity

54

What happens to pressure if force doubles and area halves?

A No change B Doubles C Triples D Becomes four times

55

A body is in equilibrium when its:

A acceleration is zero. B speed is zero. C velocity is non-uniform. D displacement is zero.

56

A couple is formed by:

A two forces perpendicular to each other. B two equal and opposite forces not in the same line. C two equal and opposite forces in the same line. D two unequal forces.

57

The vertical or perpendicular component of a force F making an angle θ with the horizontal x-axis is given by:

A F cos(θ) B F tan(θ) C F sin(θ) D F cot(θ)

58

The turning effect of a force is called:

A Momentum B Pressure C Work D Torque

59

The centre of gravity of an irregularly shaped thin lamina can be found using a:

A Plumb line B Screw gauge C Vernier callipers D Metre rule

Quarter 2

What is meant by the resultant force?

If all forces acting on a body cancel each other, the resultant force is:

Newton’s Second Law of Motion relates force with:

The mathematical form of Newton’s Second Law is:

Unit of force in SI system is:

If mass of a body is doubled and force remains same, acceleration will:

Newton’s Third Law of Motion states that:

Action and reaction forces act on:

Which of the following is an example of action-reaction pair?

Why does a gun recoil when a bullet is fired?

Which law explains motion of rockets?

Momentum of a body depends on:

Formula of momentum is:

SI unit of momentum is:

Impulse is equal to:

Impulse is equal to change in:

Unit of impulse is:

Which of the following increases impulse?

Why are airbags used in cars?

Principle of conservation of momentum states that:

What happens to the shape of a body when a force is applied?

What is deformation?

Which force can change the size of a body?

Elasticity is the property of a material to:

Which material shows elasticity?

Hooke’s Law is valid up to:

According to Hooke’s Law, force is proportional to:

What is the spring constant?

The unit of spring constant is:

A stiffer spring has:

In a load-extension graph, the straight line shows:

The limit of proportionality is the point where:

Beyond elastic limit, a material:

What is pressure?

The SI unit of pressure is:

Pressure increases when:

Why do sharp knives cut better?

Atmospheric pressure is due to:

Atmospheric pressure decreases with:

Why is atmospheric pressure lower on mountains?

Which instrument measures atmospheric pressure?

The working liquid in a mercury barometer is:

Standard atmospheric pressure is equal to:

A manometer is used to measure:

Liquid pressure depends on:

Liquid pressure increases with:

Which liquid produces more pressure at same depth?

Pascal’s Law states that pressure applied to a confined liquid:

Hydraulic machines work on:

Which is an application of Pascal’s Law?

Why do camels have wide feet?

Pressure at the bottom of a lake is:

Which factor does not affect liquid pressure?

What happens to pressure if force doubles and area halves?

A body is in equilibrium when its:

A couple is formed by:

The vertical or perpendicular component of a force F making an angle θ with the horizontal x-axis is given by:

The turning effect of a force is called:

The centre of gravity of an irregularly shaped thin lamina can be found using a: