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Physics Revision

Total questions: 106

Worksheet time: 1hrs 12mins

Name
Class
Date
1.

If a bow is stretched just before an arrow is fired, what type of energy has increased?

a)

chemical energy

b)

heat energy

c)

elastic potential energy

d)

nuclear energy

2.

Nuclear energy would be found in which situation

a)

In a power station the uses the burning of coal

b)

In a power station that splits atoms of uranium

c)

In a power station that uses water flowing down a mountain

d)

In a power station that uses radiation from the sun

3.

A person is pedalling on their bike and going down the road. Which of the following statements is true.

a)

Kinetic energy is being transferred from the pedals to the wheels

b)

Potential energy in the pedals is being transformed into kinetic energy

c)

Nuclear energy in the legs of the person is being transferred to the wheels

d)

Kinetic energy is being transferred from the wheels to the pedals

4.

Energy can be stored in a high level water reservoir. The water in the high level reservoir stores

a)

electrical energy

b)

gravitational potential energy

c)

kinetic energy

d)

nuclear energy

5.

Water in a high level reservoir is allowed to flow to the low level reservoir. The flowing water has

a)

electrical energy

b)

sound energy

c)

gravitational potential energy

d)

kinetic energy

6.

Flowing water turns a turbine which is connected to a generator thus creating electricity. The generator also produces some waste energy in the form of

a)

electrical energy

b)

kinetic energy

c)

sound energy

d)

nuclear energy

7.

The total power of a power station is 600 MW. The useful power output is 540 MW. The efficiency of the power station is

a)

100%

b)

90%

c)

50%

d)

10%

8.

The total power of a power station is 600 MW. The useful power output is 540 MW. The amount of power wasted by the power station is

a)

60 MW

b)

540 MW

c)

600 MW

d)

1140 MW

9.

The Law of the Conservation of Energy explains

a)

the importance of not wasting energy

b)

that the total amount of energy stays the same in energy transformations

c)

why the efficiency of a machine is never 100%

d)

why companies are fined if they do not keep to the law about unnecessary wastage of energy

10.

A power lifter lifts a 180 kg bar from the floor to 2 m high. Work out the change in gravitational energy. Take gravity to be 10 N kg−1kg^{-1}  

a)

36 J

b)

360 J

c)

3600 J

d)

36 000 J

11.

If a car of mass 800kg is travelling at 10 m/s what is the amount of kinetic energy it has?

a)

400 J

b)

800 J

c)

8000 J

d)

40 000 J

12.

Work done is the amount of energy used or transferred. What is the correct units of energy for work?

a)

Joules

b)

Newtons

c)

Watts

d)

Metres per second per second

13.

How much work has been done if a force of 20N is applied to a box to move it 5m?

a)

100 J

b)

25 J

c)

100 N

d)

25 N

14.

Bob can lift a 30kg box up onto the back of a truck in 3 seconds. Samson can lift the same box onto the back of the truck in 1 second. Which of the statements below is true?

a)

Samson did more work that Bob

b)

Samson is more powerful that Bob

c)

Bob and Samson are both as powerful as each other

d)

Bob is a lazy slob

15.

A car is going along the road and then smashes into a tree and comes to a halt. Which of the following statements is true?

a)

The car had potential energy as it was going along the road and this was converted into kinetic energy as it hit the tree.

b)

The tree had potential energy and this was converted into heat energy when the car hit it.

c)

The car had wind energy as it was going along the road but this was converted into elastic energy as the tree bent.

d)

Some of the kinetic energy that the car had was transformed into sound energy when it hit the tree.

16.

A cyclist travels 15 km in 0.6 hours. What is the average speed of the cyclist, in km h−1km\ h^{-1} , over this period?

a)

9 km h−1h^{-1}  

b)

0.04 kmundefined 

c)

25 kmundefined 

d)

15.6 kmundefined 

17.

Which section of the graph shown represents a stationary body?

a)

EF

b)

DE

c)

CD

d)

BC

18.

Which section of the graph shown represents a body moving with constant speed?

a)

EF

b)

DE

c)

CD

d)

BC

19.

Which section of the graph shown represents a body moving with changing speed?

a)

EF

b)

DE

c)

CD

d)

AB

20.

An athlete runs for 1.4 hours at an average speed of 15 km h−1km\ h^{-1} . What distance do they cover?

a)

21 km h−1h^{-1}  

b)

10.7 km

c)

21 km

d)

0.09 km

21.

A car is driven at 100 km h−1km\ h^{-1} to cover a distance of 25 km. How long did it take to cover this distance?

a)

4 hours

b)

1/3 hour

c)

30 minutes

d)

15 minutes

22.

When a skydiver is falling with parachute deployed, a speed toward Earth will be reached that no longer changes, the "terminal velocity".

What can be inferred about the sizes of the downward force acting on the skydiver, and the upward one, and why?

a)

the forces must be equal because there is no change in speed.

b)

the down force must be greater because weight force is large.

c)

the up force from the parachute must be greater because it is large to slow down the skydiver.

d)

not enough information is given to make a judgement.

23.

What is Newton's First Law

a)

The force is equal to mass times acceleration

b)

Every action has an equal and opposite reaction

c)

An object at rest stays at rest, an object in motion stays in motion unless acted upon by a force

d)

Friction is a force that resists motion

24.
Without a force to stop or slow a coasting object, the object will coast forever in a ______ line. 
a)
blue
b)
red
c)
straight
d)
vertical 
25.

If a stationary object starts moving then a _________________ must have acted on the object.

a)

force

b)

velocity

c)

inertia

d)

acceleration

26.

A stationary body stays at rest because the forces acting on it are

a)

Balanced

b)

Unbalanced

c)

Changing

d)

Unequal

27.

Describe the motion in the graph:

a)

Constant Speed (positive slope)

b)

Stopped (at rest)

c)

Acceleration (increasing speed)

d)

Return Home (negative slope)

28.

Describe the motion in the graph:

a)

Constant Speed (positive slope)

b)

Stopped (at rest)

c)

Acceleration (increasing speed)

d)

Return Home (negative slope)

29.

Describe the motion in the graph:

a)

Constant Speed (positive slope)

b)

Stopped (at rest)

c)

Acceleration (increasing speed)

d)

Return Home (negative slope)

30.
How long did it take this object to travel back to its reference/starting point?
a)
20 s
b)
30 s
c)
60 s
d)
100 s
31.
At 60 seconds, how far had this object traveled? 
a)
0 m
b)
10 m
c)
20 m
d)
40 m
32.

Which runner had a head start?

a)

A

b)

B

c)

C

d)

A and C

33.
What two measurements are necessary for calculating speed?
a)
Mass and time
b)
Temperature and mass
c)
Mass and distance
d)
Distance and time
34.

In which of the following graphs below are both runners moving at the same speed?

a)
b)
c)
d)
35.

What is the equation to calculate time taken for a distance to be travelled?

a)

time = speed/distance

b)

time = distance/speed

c)

time = speed x distance

d)

time = distance x speed

36.
True or false
You do work only when you exert a force on an object and move it
a)
true
b)
false
37.
Two factors that determine work are
a)
size of the force, and distance
b)
size of the force, and type of force
c)
mass, and distance
38.
work is a measurement of how much force is applied over a certain
a)
distance
b)
velocity
c)
shape
d)
size
39.
units for work are
a)
netwons
b)
joules
c)
meters
d)
seconds
40.
if you push a cart with a force of 60 N for 2 m... how much work have you done
a)
120 J
b)
30 J
c)
120 N 
d)
30 N
41.
work transfers
a)
sweat
b)
energy
c)
velocity
d)
effort
42.
The unit used to measure power is the 
a)
Watt
b)
Newton
c)
Joule
d)
Newton*meter
43.

Which of the following is the best example of work being done.

a)

doing homework

b)

lifting a box

c)

pushing a stationary box

d)

holding a box

44.
A 5000N block is lifted 10 m. How much work was done?
a)
50000 J
b)
5000 J
c)
500 J
d)
50 J
45.
 Work done = Force x _________
a)
a. distance
b)
b. acceleration
c)
c. velocity
d)
d. speed
46.
Force is a _____ or _______
a)
simple    complex
b)
push     pull
c)
up      down
d)
in      out
47.
How much work is produced when 350 N is used to move a car 5 m?
a)
70 J
b)
1750 J
c)
355 J
d)
175 J
48.
P=25 watts 
W=5000 Joules 
t=???
a)
200 sec
b)
0.0005 s
c)
125000 s
d)
125 s
49.
How much time is needed to produce 720 Joules of work if 90 watts of power is used? 
a)
0.125 s
b)
8 s
c)
64800 s
d)
80 s
50.
Power is defined as the quantity that measures the rate at which _____ is done or energy is transformed.
a)
energy
b)
time
c)
work
d)
elasticity
51.
Which of the following is a true statement about work?
a)
It measures how quickly an object accelerates 
b)
It measures how much effort is applied over a certain distance
c)
It measures the change in an object's rate of speed
d)
It measures how much time it takes to move a massive object
52.
What does one newton exerted over a distance of one meter equal?
a)
One watt
b)
One hertz
c)
One volt 
d)
One joule 
53.
A kid applies a force of 70 N to a ball over 1.1 meters. How much work did he do on the ball? 
a)
77 J
b)
7.7 J 
c)
0.7 J 
d)
770 J 
54.
A weightlifter lifts two 300 newton weights 1.5 meters off the ground. How much work has he done?
a)
600 J 
b)
660 J
c)
900 J 
d)
1200 J 
55.
Simple machines make work easier by increasing what?
a)
The distance over which work is done 
b)
The force needed to do work 
c)
The time required to do work
d)
The acceleration of a massive object 
56.
Which of these is a measure of force?
a)
100 newtons
b)
100 meters per second
c)
100 joules
d)
100 watts
57.
You move a 12-newton box up a 6-meter ramp. In order to find out how much power you created, what would you need to know?
a)
The mass of the box
b)
The slope of the ramp 
c)
The direction the box moved
d)
How long the task took
58.
You do 90 joules of work in 30 seconds. How much power have you generated?
a)
30 watts
b)
3 watts
c)
120 watts
d)
270 watts
59.
You move an 8-newton weight five meters in 4 seconds. How much power have you generated?
a)
160 watts
b)
10 watts
c)
6.4 watts
d)
17 watts
60.
Which of the following would produce the most power?
a)
A mass of 10 kilograms lifted 10 meters in 10 seconds 
b)
A mass of 10 kilograms lifted 10 meters in 5 seconds
c)
A mass of 5 kilograms lifted 10 meters in 5 seconds
d)
A mass of 5 kilograms lifted 5 meters in 10 seconds
61.
Work divided by time equals...
a)
energy
b)
power
62.
The unit of work is the ...
a)
joule
b)
force
63.
The unit of power is the...
a)
work
b)
watt
64.
Force multiplied by distance equals...
a)
work
b)
power
65.
Work is done on an object when the object moves in the SAME direction in which the force is applied.
a)
True
b)
False
66.
The FARTHER you move an object, the more work you do.
a)
True
b)
False
67.
The more POWER you use to move an object, the more work you do. 
a)
True
b)
False
68.
If you lift a box from the floor to a height of 1m and then carry the for for 10m, you do work only when you CARRY the box.
a)
True
b)
False
69.
Power is the RATE at which work is done. 
a)
True
b)
False
70.

What is needed to calculate work?

a)

force

b)

distance

c)

time

d)

mass

71.

Which of the graphs shows that one of runners started 10 yards further ahead of the

other?

a)
b)
c)
d)
72.

In which of the following graphs below are both runners moving at the same speed?

a)
b)
c)
d)
73.

Match the description to the graph:

"The car is stopped."

a)
b)
c)
d)
74.

Match the description to the graph:

"The car is traveling at a constant speed."

a)
b)
c)
d)
75.

Match the description to the graph:

"The speed of the car is decreasing."

a)
b)
c)
d)
76.

Match the description to the graph:

"The car is coming back."

a)
b)
c)
d)
77.

Segment O-A The bus is _________________.

a)

at rest

b)

returning (to original position)

c)

moving forward

78.

Segment A-B The bus is _________________.

a)

at rest

b)

returning (to original position)

c)

moving forward

79.

Segment B-C The bus is _________________.

a)

at rest

b)

returning (to original position)

c)

moving forward

80.

Segment C-D The bus is _________________.

a)

at rest

b)

returning (to original position)

c)

moving forward

81.

Segment D-E The bus is _________________.

a)

at rest

b)

returning (to original position)

c)

moving forward

82.

Segment E-F The bus is _________________.

a)

at rest

b)

returning (to original position)

c)

moving forward

83.

Which runner won the race?

a)

Albert

b)

Bob

c)

Charlie

84.

Which runner stopped for a rest?

a)

Albert

b)

Bob

c)

Charlie

85.

How long did Charlie stop for a rest?

a)

2.5 seconds

b)

2 seconds

c)

3 seconds

d)

5 seconds

86.

How long did Bob take to complete the race?

a)

17 seconds

b)

12 seconds

c)

14 seconds

d)

15 seconds

87.

Calculate Albert's average speed for the 100-meter race.

a)

8.33 m/s

b)

5 m/s

c)

7.14 m/s

d)

5.88 m/s

88.

Which of the graphs shows that one of runners started in the same place?

a)
b)
c)
d)
89.

Which of the graphs shows that one of runners ended the race 10 yards ahead of the other?

a)
b)
c)
d)
90.

In which of the following graphs below did one runner overtake (run past) the other?

a)
b)
c)
d)
91.

What is shown in this displacement vs time graph?

a)

uniform velocity

b)

uniform speed

c)

no speed (at rest)

d)

acceleration

92.

What does this graph mean?

a)

no velocity (at rest)

b)

uniform velocity

c)

uniform speed

93.

What is shown in this graph?

a)

uniform velocity and initial displacement 10m

b)

uniform velocity and initial velocity 10m

c)

acceleration

94.

What is happening between B and C in this graph?

a)

constant acceleration

b)

uniform velocity

c)

at rest

95.

What is happening between C and D in this graph?

a)

constant acceleration

b)

uniform velocity

c)

at rest

96.

What is happening in this graph?

a)

constant positive velocity

b)

constant negative velocity

c)

negative acceleration

d)

gravity

97.

What is happening from A to B?

a)

acceleration

b)

uniform velocity

c)

uniform acceleration

98.

What is happening from B to C?

a)

acceleration

b)

uniform negative velocity

c)

uniform acceleration

99.

What is happening from A to B, from B to C and from C to D in the given graph?

a)

A to B uniform positive velocity, B to C at rest, C to D uniform negative velocity

b)

A to B positive acceleration, B to C no acceleration and C to D negative acceleration

c)

A to B high speed, B to C low speed, C to D very low speed

100.

Find the velocity from the given graph.

a)

2 m/s

b)

12\frac{1}{2} m/s

c)

100 m/s

d)

-2m/s

101.

Find the velocity from the given graph.

a)

2 m/s

b)

-2m/s

c)

2.5m/s

102.

Find the velocity from the given graph.

a)

-2m/s

b)

−12  ms-\frac{1}{2}\ \ \frac{m}{s}

c)

2m/s

103.

what does this graph show?

a)

positive acceleration

b)

negative acceleration (deceleration)

c)

positive uniform velocity

d)

negative uniform velocity

104.

what is shown in this graph?

a)

negative velocity

b)

positive velocity

c)

negative acceleration deceleration

d)

positive acceleration

105.

Initial velocity of a car was 10m/s after 5s the velocity of the car 30m/s. Find the acceleration of the car.

a)

4

ms2\frac{m}{s^2}

b)

4m/s

c)

3m

106.

Find how much time does it take for the car to go from rest to 10m/s at an acceleration of 2m/s^2(use the acceleration triangle)

a)

5s

b)

2s

c)

1m/s

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