Free Printable 9 General, Term2 , CA2 Revisions

1.

What is the correct formula for the Mechanical advantage

a)

input force ÷ output force

b)

output force ÷ input force

c)

input force × output force

d)

input work ÷ output work

2.

What is the correct formula for the efficiency

a)

( input work ÷ output work ) × 100%

b)

( output work ÷ input work ) × 100%

c)

input work × output work

d)

input force ÷ output force

3.

depending on the next diagram, calculate the mechanical advantage

a)

0.42

b)

3.2

c)

2.3

d)

4.2

4.

depending on the next diagram, calculate the mechanical advantage

a)

0.42

b)

3.2

c)

2.3

d)

4.2

5.

depending on the next diagram, calculate the efficiency

a)

105%

b)

85%

c)

95%

d)

100%

6.

is the ability to do work and cause change.

a)

System

b)

Energy

c)

Work

d)

Force

7.

is a single or a group of objects with an

imaginary boundary.

a)

System

b)

Energy

c)

Work

d)

Force

8.

The unit of energy is ______.

a)

joules

b)

newton

c)

Joules/second

d)

Newton-meter

9.

The energy stored in an object due to interactions

between objects is ____ energy.

a)

kinetic

b)

potential

c)

heat

d)

electrical

10.

The energy possessed by an object due to its

motion is _____.

a)

kinetic

b)

potential

c)

heat

d)

electrical

11.

E = ½ mV² Apply this formula to calculate

a)

kinetic energy

b)

potential energy

c)

heat energy

d)

electrical energy

12.

E = mgh Apply this formula to calculate

a)

kinetic energy

b)

Gravitational potential energy

c)

elastic potential energy

d)

electrical energy

13.

which factor affecting The gravitational potential energy

a)

the speed

b)

The mass

c)

The temperature

d)

The volume

14.

Energy released during nuclear fission or fusion

a)

kinetic

b)

Nuclear

c)

heat

d)

electrical

15.

energy stored in the bonds of the compounds

a)

kinetic

b)

Nuclear

c)

Chemical

d)

electrical

16.

Energy produced when a rise in temperature causes atoms

and molecules to move faster and collide with each other

a)

kinetic

b)

Nuclear

c)

Chemical

d)

Thermal

17.

What type of energy inside the fule

a)

kinetic

b)

nuclear

c)

heat

d)

chemical

18.

The energy equivalent to the mass of a particle at rest in an

inertial frame of reference ( E = mc²)

a)

kinetic energy

b)

rest energy

c)

Chemical energy

d)

Thermal energy

19.

which factor affecting The gravitational kinetic energy

a)

the speed

b)

The shape

c)

The temperature

d)

The volume

20.

which of the following energy forms is a potential enegry

a)

kinetic

b)

Nuclear

c)

heat

d)

electrical

21.

Identify the energy conversions taking place in the next diagram

a)

Chemical to electrical

b)

Thermal to chemical

c)

chemical to mechanical

d)

chemical to light

22.

Identify the energy conversions taking place in the next diagram

a)

Chemical to electrical

b)

Thermal to chemical

c)

chemical to mechanical

d)

electrical to light

23.

Identify the energy conversions taking place in the next diagram

a)

Chemical to electrical

b)

thermal to chemical

c)

chemical to mechanical

d)

electrical to light

24.

A baseball with a mass of 1.0 kg is moving at a speed of 10.0 m/s. What is baseball’s kinetic energy from this

motion?

a)

100 J

b)

50 J

c)

1000 J

d)

40 J

25.

A car doubles its speed from 50 km/h to 100 km/h.

By how many times does the kinetic energy from

the car’s forward motion increase?

a)

2 times

b)

4 times

c)

6 times

d)

8 times

26.

An 8.0 kg history textbook is placed on a 1.50 m high desk.

find the gravitational potential energy of the textbook-Earth system relative to the floor?

a)

80 J

b)

100 J

c)

120 J

d)

140 J

27.

The law of conservation of energy states that ____.

a)

Energy can be destroyed

b)

Energy can be created

c)

Energy decreases over time

d)

Energy cannot be created or destroyed, but

can be transformed from one form to

another

28.

Friction causes mechanical energy to be converted

into which form?

a)

thermal energy

b)

kinetic energy

c)

nuclear energy

d)

potential energy

29.

Which energy transformation is happening from

position A to B?

a)

Kinetic energy to GPE

b)

GPE to kinetic energy

c)

Thermal energy to mechanical energy

d)

Mechanical energy to chemical energy

30.

Which energy transformation is happening from

position B to C ?

a)

Kinetic energy to GPE

b)

GPE to kinetic energy

c)

Thermal energy to mechanical energy

d)

Mechanical energy to chemical energy

31.

At what point on the ball’s path is the kinetic

energy of the ball the least?

a)

Point A

b)

Point B

c)

Point C

d)

Point D

32.

At what point on the ball’s path is the potential

energy of the ball the greatest?

a)

Point A

b)

Point B

c)

Point C

d)

Point D

33.

According to the graph, which is the best estimate

for the kinetic energy from the rock’s falling

motion after the rock has fallen for 2 s?

a)

0 J

b)

50 J

c)

100 J

d)

200 J

34.

According to the graph, which is the best estimate

for the potential energy from the rock’s falling

motion after the rock has fallen for 2 s?

a)

100 J

b)

500 J

c)

600 J

d)

200 J

35.

According to the graph, which is the best estimate

for the potential energy from the rock’s falling

motion after the rock has fallen for 4 s?

a)

0 J

b)

50 J

c)

100 J

d)

200 J

36.

A body falls down in a place where all force of friction are negligible and the energy vs time graph is shown below.

a. Which graph corresponds to kinetic energy?

a)

graph A

b)

graph B

c)

graph C

37.

A body falls down in a place where all force of friction are negligible and the energy vs time graph is shown below.

a. Which graph corresponds to potential energy?

a)

graph A

b)

graph B

c)

graph C

38.

A body falls down in a place where all force of friction are negligible and the energy vs time graph is shown below.

a. Which graph corresponds to mechanical energy?

a)

graph A

b)

graph B

c)

graph C

39.

The law of conservation of energy states that ____.

a)

Energy can be destroyed

b)

Energy can be created

c)

Energy decreases over time

d)

Energy cannot be created or destroyed, but

can be transformed from one form to

another

40.

Friction causes mechanical energy to be converted

into which form?

a)

thermal energy

b)

kinetic energy

c)

nuclear energy

d)

potential energy

41.

Which energy transformation is happening from

position A to B?

a)

Kinetic energy to GPE

b)

GPE to kinetic energy

c)

Thermal energy to mechanical energy

d)

Mechanical energy to chemical energy

42.

Which energy transformation is happening from

position B to C ?

a)

Kinetic energy to GPE

b)

GPE to kinetic energy

c)

Thermal energy to mechanical energy

d)

Mechanical energy to chemical energy

43.

At what point on the ball’s path is the kinetic

energy of the ball the least?

a)

Point A

b)

Point B

c)

Point C

d)

Point D

44.

At what point on the ball’s path is the potential

energy of the ball the greatest?

a)

Point A

b)

Point B

c)

Point C

d)

Point D

45.

According to the graph, which is the best estimate

for the kinetic energy from the rock’s falling

motion after the rock has fallen for 2 s?

a)

0 J

b)

50 J

c)

100 J

d)

200 J

46.

According to the graph, which is the best estimate

for the potential energy from the rock’s falling

motion after the rock has fallen for 2 s?

a)

100 J

b)

500 J

c)

600 J

d)

200 J

47.

According to the graph, which is the best estimate

for the potential energy from the rock’s falling

motion after the rock has fallen for 4 s?

a)

0 J

b)

50 J

c)

100 J

d)

200 J

48.

A body falls down in a place where all force of friction are negligible and the energy vs time graph is shown below.

a. Which graph corresponds to kinetic energy?

a)

graph A

b)

graph B

c)

graph C

49.

A body falls down in a place where all force of friction are negligible and the energy vs time graph is shown below.

a. Which graph corresponds to potential energy?

a)

graph A

b)

graph B

c)

graph C

50.

A body falls down in a place where all force of friction are negligible and the energy vs time graph is shown below.

a. Which graph corresponds to mechanical energy?

a)

graph A

b)

graph B

c)

graph C

51.

The bob of the pendulum shown below has a mass of 2 𝑘𝑔. The motion started from position A at a height of 1.5 m . The string is massless and the frictional forces and air resistance are negligible. Use 𝑔=10.0 𝑚⁄𝑠2

a. Find the mechanical energy for the bob at position A.

a)

10 J

b)

20 J

c)

30 J

d)

40 J

52.

The bob of the pendulum shown below has a mass of 2 𝑘𝑔. The motion started from position A at a height of 1.5 m . The string is massless and the frictional forces and air resistance are negligible. Use 𝑔=10.0 𝑚⁄𝑠2

a. Find the potential energy for the bob at position A.

a)

10 J

b)

20 J

c)

30 J

d)

40 J

53.

The bob of the pendulum shown below has a mass of 2 𝑘𝑔. The motion started from position A at a height of 1.5 m . The string is massless and the frictional forces and air resistance are negligible. Use 𝑔=10.0 𝑚⁄𝑠2

a. Find the kinetic energy for the bob at position A.

a)

0 J

b)

20 J

c)

30 J

d)

40 J

54.

The bob of the pendulum shown below has a mass of 2 𝑘𝑔. The motion started from position A at a height of 1.5 m . The string is massless and the frictional forces and air resistance are negligible. Use 𝑔=10.0 𝑚⁄𝑠2

a. Find the potential energy for the bob at position B.

a)

0 J

b)

20 J

c)

30 J

d)

40 J

55.

The bob of the pendulum shown below has a mass of 2 𝑘𝑔. The motion started from position A at a height of 1.5 m . The string is massless and the frictional forces and air resistance are negligible. Use 𝑔=10.0 𝑚⁄𝑠2

a. Find the kinetic energy for the bob at position B.

a)

0 J

b)

20 J

c)

30 J

d)

40 J

56.

The bob of the pendulum shown below has a mass of 2 𝑘𝑔. The motion started from position A at a height of 1.5 m . The string is massless and the frictional forces and air resistance are negligible. Use 𝑔=10.0 𝑚⁄𝑠2

a. Find the mechanical energy for the bob at position B.

a)

0 J

b)

20 J

c)

30 J

d)

40 J

57.

The bob of the pendulum shown below has a mass of 2 𝑘𝑔. The motion started from position A at a height of 1.5 m . The string is massless and the frictional forces and air resistance are negligible. Use 𝑔=10.0 𝑚⁄𝑠2

a. Find the mechanical energy for the bob at position C.

a)

0 J

b)

20 J

c)

30 J

d)

40 J

58.

The bob of the pendulum shown below has a mass of 2 𝑘𝑔. The motion started from position A at a height of 1.5 m . The string is massless and the frictional forces and air resistance are negligible. Use 𝑔=10.0 𝑚⁄𝑠2

a. Find the potential energy for the bob at position C.

a)

0 J

b)

20 J

c)

30 J

d)

40 J

59.

The bob of the pendulum shown below has a mass of 2 𝑘𝑔. The motion started from position A at a height of 1.5 m . The string is massless and the frictional forces and air resistance are negligible. Use 𝑔=10.0 𝑚⁄𝑠2

a. Find the kinetic energy for the bob at position C.

a)

0 J

b)

20 J

c)

30 J

d)

40 J

60.

What is the output power for a computer using an

energy of 2000 J in 100 s?

a)

10 W

b)

20 W

c)

30 W

d)

40 W

61.

A microwave oven with a power rating of 1000 W

is turned on for 5 s. Calculate the energy used by the

microwave.

a)

0.005 J

b)

40.0 J

c)

200 J

d)

5000 J

62.

depending on the next diagram, What is the KE of the ball

( 3 kg ) at point A ( 10 m ) above the ground level,

a)

zero, Because the ball not moving

b)

150 J

c)

300 J

d)

450 J

63.

depending on the next diagram, What is the PE of the ball

( 3 kg ) at point A ( 10m ) above the ground level,

a)

zero, Because the ball not moving

b)

150 J

c)

300 J

d)

450 J

64.

depending on the next diagram, What is the ME of the ball

( 3 kg ) at point A ( 10m ) above the ground level,

a)

zero, Because the ball not moving

b)

150 J

c)

300 J

d)

450 J

65.

depending on the next diagram, What is the PE of the ball

( 3 kg ) at point C at the ground level,

a)

zero, Because the height is zero

b)

150 J

c)

300 J

d)

450 J

66.

depending on the next diagram, What is the KE of the ball

( 3 kg ) at point C at the ground level,

a)

zero, Because the height is zero

b)

150 J

c)

300 J

d)

450 J

67.

depending on the next diagram, What is the ME of the ball

( 3 kg ) at point C at the ground level,

a)

zero, Because the height is zero

b)

150 J

c)

300 J

d)

450 J

68.

depending on the next diagram, What is the PE of the ball

( 3 kg ) at point B ( 5 m ) above the ground level,

a)

zero, Because the height is zero

b)

150 J

c)

300 J

d)

450 J

69.

depending on the next diagram, What is the KE of the ball

( 3 kg ) at point B ( 5 m ) above the ground level,

a)

zero, Because the height is zero

b)

150 J

c)

300 J

d)

450 J

70.

depending on the next diagram, What is the ME of the ball

( 3 kg ) at point B ( 5 m ) above the ground level,

a)

zero, Because the height is zero

b)

150 J

c)

300 J

d)

450 J

71.

The nucleus of an atom consists of ____

a)

protons only

b)

neutrons only

c)

electrons only

d)

both protons and neutrons

72.

The particles with no electric charge are______.

a)

protons only

b)

neutrons only

c)

electrons only

d)

both protons and neutrons

73.

The particles with positive electric charge are______.

a)

protons only

b)

neutrons only

c)

electrons only

d)

both protons and neutrons

74.

In a neutral atom, the number of protons are equal

to the number of ___.

a)

electrons

b)

neutrons

c)

electrons plus neutrons

d)

electrons minus neutrons

75.

The particles with negative electric charge are______.

a)

protons only

b)

neutrons only

c)

electrons only

d)

both protons and neutrons

76.

All the isotopes of the same element must have the

same ______.

a)

number of protons

b)

number of electrons

c)

number of neutrons

d)

Number of neutrons plus the protons

77.

All the isotopes of the same element must have the

different ______.

a)

number of protons

b)

number of electrons

c)

number of neutrons

d)

Number of neutrons plus the protons

78.

Mass number is the number of ______in an atom.

.

a)

protons

b)

electrons

c)

electrons plus the protons

d)

neutrons plus the protons

79.

the atomic number is the number of ______in an atom.

a)

protons

b)

electrons

c)

electrons plus the protons

d)

neutrons plus the protons

80.

What keeps the particles of a nucleus together?

a)

Strong force

b)

Weak force

c)

Electromagnetic force

d)

Gravity

81.

depending on the next element, What is the atomic number

a)

2

b)

4

c)

6

d)

8

82.

depending on the next element, What is the mass number

a)

2

b)

4

c)

6

d)

8

83.

depending on the next element, What is the number of protons in the nucleus?

a)

2

b)

4

c)

6

d)

8

84.

depending on the next element, What is the number of neutrons in the nucleus?

a)

2

b)

4

c)

6

d)

8

85.

Which of the following describes the electric

forces between protons. Tick all the correct answers.

a)

Weak forces

b)

Strong forces

c)

Short range

d)

Long range

86.

Which of the following describes the nuclear

forces between protons. Tick all the correct answers.

a)

Weak forces

b)

Strong forces

c)

Short range

d)

Long range

87.

In which nucleus are the protons and neutrons held

more tightly together?

a)

small

b)

large

c)

Both small and large

d)

Neither small nor large

88.

In less massive elements ( less than 20 Protons ) an isotope is stable

when the ratio of neutrons to protons ( n/p ) is about _____.

a)

1:1

b)

1:2

c)

2:3

d)

3:2

89.

In more massive elements ( more than 20 Protons ) an isotope is stable

when the ratio of neutrons to protons ( n/p ) is about _____.

a)

1:1

b)

1:2

c)

2:3

d)

3:2

90.

________ is the process of nuclei decaying and

emitting matter and energy.

a)

Explosion

b)

Radioactivity

c)

Chemical reaction

d)

Nuclear binding

91.

The formula for the rest mass energy is ____.

a)

E= mc²

b)

E = 1/2 mV²

c)

E= mgh

d)

E = f.d

92.

Mass-energy equivalence is apparent during _____.

a)

Chemical reactions

b)

Nuclear reactions

c)

Both chemical and nuclear reactions

d)

Neither chemical nor nuclear reactions

93.

A small amount of mass is the same thing as a very

large amount of _____.

a)

density

b)

volume

c)

energy

d)

speed

94.

The graph below shows the mass-energy

equivalence. How are the mass and energy related?

a)

𝐸 ∝ 𝑚

b)

𝐸 ∝ 𝑚²

c)

𝐸 ∝ 1/𝑚

d)

𝐸 ∝ 1/𝑚²

95.

The graph below shows the mass-energy

equivalence. Which of the following can be used to calculate the

speed of light from the graph?

a)

𝑐 = 𝑠𝑙𝑜𝑝𝑒

b)

𝑐 = 𝑠𝑙𝑜𝑝𝑒/2

c)

𝑐 = √𝑠𝑙𝑜𝑝𝑒

d)

𝑐 = √𝑠𝑙𝑜𝑝𝑒/2

96.

How much energy is equal to 1.0 kg mass?

a)

9.0 × 10¹⁶ 𝐽

b)

6.0 × 10¹⁶ 𝐽

c)

9.0 × 10⁸ 𝐽

d)

6.0 × 10⁸ 𝐽

97.

Which of the following is an equipment to detect

nuclear radiations? Select all the correct answers.

a)

Tracer

b)

Geiger counter

c)

A wire chamber

d)

Voltage source

98.

A ________ is a radioactive isotope that doctors use

to locate molecules in an organism

a)

Tracer

b)

Geiger counter

c)

A wire chamber

d)

Voltage source

99.

After the third half-life, how much of the sample is left?

a)

1/2

b)

1/3

c)

1/16

d)

1/8

100.

If 10 g of iodine 131 is given to a patient, how much is left after 24 days? The half-life of iodine-131 is 8 days.

a)

1.25mg

b)

1.25g

c)

10g

d)

10mg

101.

The half-life of strontium-90 is 25 years. How much strontium-90 will remain after 100 years if the initial amount is 4.0 g?

a)

3.0g

b)

0.25mg

c)

0.3g

d)

0.25g

102.

You have 100 grams of radioactive C-14. The half life of C-14 is 5730 years.
How many grams are left after 1 half life?

a)

100 grams

b)

25 grams

c)

2 grams

d)

50 grams

103.

What is Half-life?

a)

The amount of time it takes for some of the nuclei in a sample of the isotope to decay

b)

The amount of time it takes for half the electrons in a sample of the isotope to decay

c)

The amount of time it takes for half the nuclei in a sample of the isotope to decay

d)

the amount of time it takes to double the nuclei in a sample of the isotope to decay

104.

After 22,800 years, approximately what percentage of the original carbon-14 remains?

a)

15%

b)

12.5%

c)

6.25%

d)

3.125%

105.

What is the half-life of iodine-131?

a)

32 days

b)

8 days

c)

16 days

d)

24 days

106.

What is the Half Life of this isotope?

a)

3 days

b)

5 days

c)

8 days

d)

10 days

107.

Which of the radioactive tracer isotopes is used to

detect problems in the thyroid?

a)

Carbon-14

b)

Technetium-99

c)

Iodine-131

d)

Uranium-235

108.

If a radioactive material has a 10y half-life,

what fraction of the material will be left after

30 y?

a)

One-half

b)

One-third

c)

One fourth

d)

One-eighth

109.

A daughter nucleus is the ______.

a)

nucleus before the nuclear decay

b)

nucleus after the nuclear decay

c)

energy released during the nuclear decay

d)

radiation emitted during the nuclear decay

9 General, Term2 , CA2 Revisions

Total questions: 109

Worksheet time: 2hrs 43mins

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