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Physics revision

Total questions: 80

Worksheet time: 3600secs

Name
Class
Date
1.
The easiest way to open a heavy door  is by applying the force
a)
Near the hinges
b)
In the middle of the door
c)
At the edge of the door far from the hinges
d)
At the top of the door
2.
A wrench is used to tighten a nut. A 15N perpendicular force is applied 50cm away from the axis of rotation, and moves a distance of 10 cm as it turns. What is the torque applied to the wrench?
a)
7.5 Nm
b)
1.5 Nm
c)
750 Nm
d)
150 Nm
3.

What condition must be met if an object is to be in equilibrium?

a)

force on it must be balanced

b)

force on it mus be unbalanced

c)

resultant force more than 10 N

d)

resultant turning effect more than 10

4.
What happens when two forces act in the same direction?
a)
They cancel each other out.
b)
The stronger one prevails.
c)
Their strengths are added.
d)
Their sum divided by the two is the total force.
5.

Define Displacement

(a)  

6.

Which of the below are vector quantities

a)

Distance

b)

Displacement

c)

Speed

d)

Velocity

7.

Define Vector

(a)  

8.

Which of the below are scalar quantities

a)

Distance

b)

Displacement

c)

Speed

d)

Velocity

9.

One car is travelling from town A to town B. Town B is north from town A. If the car is to take the scenic route where it winds down back roads, the car will have to travel 200 km, but if the car takes the direct route, it will only have to travel 90 km. What will be the displacement of the car if it starts at point A and ends at point B.

(a)  

10.
The units for momentum are
a)
kg
b)
m/s
c)
kg-m/s
d)
kg/m/s
11.
Some air is trapped inside a small balloon. The average kinetic energy of the air molecules in the balloon is increased. What remains the same? 
a)
the density of the air in the balloon 
b)
the mass of the air in the balloon 
c)
the temperature of the air in the balloon 
d)
the volume of the air in the balloon 
12.
The units for momentum are
a)
kg
b)
m/s
c)
kg-m/s
d)
kg/m/s
13.
A bug flies into the windshield of a car going the opposite way. Which of the following are true.
a)
the force of impact is the same for both
b)
the impulse is the same for both
c)
the acceleration of the bug is larger than the truck
d)
A, B, and C are all true
14.

A pendulum oscillating near the surface of the Earth swings with a time period T. What is the time period of the same pendulum near the surface of the planet Mercury where the gravitational field strength is 0.4g?

a)

0.2 T

b)

0.6 T

c)

1.2 T

d)

1.6 T

15.

Which of the following is a derived SI unit?

a)

Newton

b)

Kilogram

c)

Celsius

d)

Second

16.

Which of the following situations indicates zero acceleration?

a)

A durian falling down from the tree

b)

A netball is thrown up to the sky at the beginning of the game

c)

A force of 2 N, acting on a toy car which is on rough surface with frictional force of 2 N

d)

An aircraft climbing up to a certain height

17.

Diagram 5 shows an athlete performing the high jump

What is the function of the mattress?

a)

To reduce the collision time between the athlete and the mattress

b)

To reduce the change of momentum of the athlete when he hit the mattress

c)

To reduce the impulsive force acting on the athlete when he hit the mattress

d)

To increase the impulsive force acting on the athlete when he hit the mattress

18.

The specific heat capacity of aluminium is 900 J 𝑘𝑔−1 °𝐶−1.

Which statement explains the specific heat capacity of aluminium correctly?

a)

1kg of aluminium absorbs 900 J of heat energy during heating.

b)

The temperature of 1kg of aluminium will rise by 1 °C when it absorbs 900 J of heat energy.

c)

The temperature of 1 kg of aluminium will drop by 1 °C when it absorbs 900 J of heat energy.

d)

Aluminium requires 900 J of heat energy to increase its temperature by 1°C.

19.

Which is needed to determine the amount of gravitational force between two objects?

a)

distance and mass

b)

weight and time

c)

area and weight

20.

The gravitational force exerted by an object depends on its

a)

volume

b)

mass

c)

weight

21.

Gravity on moon is less than the gravity on earth because

a)

moon's mass is less

b)

moon's mass is more

c)

moon's mass is equal to Earth

d)

moon has no mass

22.

Which of the following is true about geostationary satellite?

a)

It does not experience any gravitational pull

b)

Above different geographical location.

c)

The orbital period is longer than 24 hours.

d)

Its period of rotation is one day.

23.

name me this wave?

a)

circle

b)

transverse wave

c)

longitudinal wave

d)

👽

24.

name the wave?

a)

transverse wave

b)

longitudinal wave

c)

a wave

25.

Two 20 Ω resistors are connected as shown in Figure 3.

a)

1 Ω

b)

10 Ω

c)

15 Ω

d)

50 Ω

26.

A ball tossed vertically upward rises, reaches its highest point and then falls back to its starting point. During this time the acceleration of the ball is always:

a)

in the direction of motion.

b)

opposite its velocity.

c)

directed upward.

d)

directed downward.

27.

A car starts from rest and reaches a velocity of 15 m s–1 in 5 seconds. Calculate how far the car travelled in this time.

a)

21 m

b)

41.72 m

c)

12.34 m

d)

37.5 m

28.

Calculate the magnitude of the momentum of the following moving objects:
1.5 tonne car moving at 15  ms−1ms^{-1} ( 1 tonne = 1000 kg)

a)

 225000 kg m s−1225000\ kg\ m\ s^{-1}  

b)

 562000 kg m s−1562000\ kg\ m\ s^{-1}  

c)

 127000 kg m s−1127000\ kg\ m\ s^{-1}  

d)

 987000 kg m s−1987000\ kg\ m\ s^{-1}  

29.

A ball is thrown vertically upward at 30 m s–​1. Calculate, its maximum height and the time taken to reach this height

a)

45.9m / 3.06s

b)

30.12m / 2.12s

c)

39.7m / 4.12s

d)

48.2m / 3.409s

30.

A soccer player kicks a ball with 20 Newtons of force causing it to travel 100 meters. How much work is done on the ball?

a)

200 J

b)

80 J

c)

5 J

d)

2000 J

31.

What is the same as Work Done?

a)

Power

b)

Energy Transferred

32.

What is the gravitational potential energy of an 85 kg mountain climber at the summit of a 6267 m volcano?

Let g = 9.8N/kg

a)

5,220,411 J

b)

532,695 J

c)

73.7 J

d)

54,356.6 J

33.
What is the KE of a football which has a mass of 0.8 kg and is kicked at a velocity of 10m/s.
a)
80 J
b)
3.2 J
c)
160 J
d)
40 J
34.

What percent energy is wasted by a machine if the energy input is 262 J and the energy output is 131 J?

a)

5%

b)

50%

c)

100 J

35.
The SI unit in which kinetic energy is measured is 
a)
Newton
b)
Kilogram
c)
Joules
d)
Metres per second
36.
If 68 W of power is produced in 18 seconds, how much work is done?
a)
1,224 J
b)
0.264 J
c)
3.77 J
d)
12.24 J
37.
If 68 Joules were necessary to move a 4 Newton crate, how far was the crate moved?
a)
272 m
b)
17 m
c)
4.05 m
d)
272 cm 
38.

A battery is connected to a motor that lifts a mass. The chemical energy store of the battery is transferred ______ ______ to the kinetic energy store of the motor, which is transferred ___________ to the gravitational and kinetic stores of the mass.

a)

electrically, mechanically

b)

heating, radiation

c)

electrically, heating

d)

radiation, mechanically

39.

What are the units of power?

a)

Joules

b)

Newtons

c)

Amps

d)

Watts

e)

Kilowatt-hours

40.

An object with a mass of 5kg is dropped from a height of 100m. What is the impact velocity with the ground, in metres per second, to one decimal place? Do not type the units.

(a)  

41.

Which of these are measured in Joules? Tick all that apply.

a)

Kinetic energy

b)

Weight

c)

Thrust

d)

Power

e)

Work done

42.

What are the two quantities needed to work out momentum and also kinetic energy?

a)

mass

b)

time

c)

acceleration

d)

velocity

e)

distance

43.

Which of these is not an equation for energy?

a)

12mv2\frac{1}{2}mv^2

b)

mghmgh

c)

PtPt

d)

mvmv

e)

FdFd

44.

Compared with an Ohmic device, a non-Ohmic device has:

a)

constant resistance

b)

constant current

c)

variable resistance

d)

variable current

45.

What is the conventional current in a wire in a circuit?

a)

The flow of electrons from positive to negative

b)

The flow of negative charges from negative to positive

c)

The flow of protons from negative to positive

d)

The flow of positive charges from positive to negative

46.

In 1820 oersted accidentally discovered:

a)

Compass needle didn’t move when an electric current passed through a metallic wire placed nearby.

b)

Compass needle got deflected when an electric current passed through a metallic wire placed nearby.

c)

Compass needle moved when no electric current passed through a metallic wire placed nearby.

d)

Metallic wire moved when compass was brought near it.

47.

Why does a compass needle get deflected when brought near a bar magnet?

a)

Bar magnet has electric current passing through it, therefore it deflects

b)

Compass needle has electric current passing through it; therefore, it deflects when brought near a bar magnet

c)

The magnetic field lines of the compass needle interact with the magnetic field lines of bar magnet, therefore it deflects

d)

The north pole of the compass needle interacts with the north pole of the bar magnet, therefore it deflects

48.

The atomic mass of an atom is equal to

a)

number of protons plus number of neutrons

b)

number of protons plus number of electrons

c)

number of electrons plus the number of neutrons

49.

What two subatomic particles must be equal for an atom to have no charge (neutral).

a)

protons and neutrons

b)

protons and electrons

c)

electrons and neutrons

50.
Calculate the work needed to raise a 3 kg cat up to a height of
4 m.
a)
12 J
b)
0 J
c)
120 J
d)
1.22 J
51.
As a pendulum swings from its highest to lowest position, what happens to its kinetic and potential energy? 
a)
Both the potential energy and kinetic energy decrease
b)
The potential energy decreases while the kinetic energy increases 
c)
The kinetic energy decreases while the potential energy increases 
d)
Bothe the potential energy and kinetic energy increase 
52.
The measure of cycles per second is called the ____________.
a)
period
b)
frequency
c)
wavelength
d)
velocity
53.
The SI unit used to measure the frequency of a wave is _____________.
a)
hertz
b)
seconds
c)
meters
d)
decibels
54.
The loudness or volume of sound is related to which wave property?
a)
wavelength
b)
frequency
c)
amplitude
d)
speed
55.
What is the approximate speed of sound in normal air?
a)
34 m/s
b)
340 m/s
c)
30,000 m/s
d)
300 million m/s
56.
The product of frequency and wavelength is always equal to the wave's ______________.
a)
amplitude
b)
velocity
c)
period
d)
color
57.
The lowest point of a transverse wave is called the _________.
a)
crest
b)
trough
c)
amplitude
d)
rest position
58.
The amplitude measures the distance between the:
a)
crest and next crest
b)
trough and next trough
c)
crest and trough
d)
rest position and crest
59.

wavelength = 0.5 m

wave speed = 5 m/s

Calculate the frequency!

v = fλ

a)

5 seconds

b)

10 Hz

c)

2.5 Hz

d)

1/5 m

60.
The oscillations of these types of waves cause the medium to move perpendicular to the direction of the wave's motion.
a)
longitudinal
b)
transverse
c)
sound
d)
seismic
61.
Which region of the electromagnetic spectrum has MORE energy than visible light?
a)
ultraviolet rays
b)
radio waves
c)
microwaves
d)
infrared radiation
62.
The combination of all colours of light is called _______ light.
a)
invisible
b)
ROYGBIV
c)
electromagnetic
d)
white
63.
BLUE light has  _______ frequency when compared to RED light.
a)
a higher
b)
a lower
c)
an equal
d)
an uneven
64.
The Law of Reflection states that the angle of ___________ is equal to the angle of reflection.
a)
inversion
b)
refraction
c)
incidence
d)
absorption
65.
Materials with a higher refractive index, n , tend to refract light at  ________ angle.
a)
a larger
b)
a smaller
c)
at an inconsistent
d)
a very tight
66.
The colour of visible light is directly related to its ____________.
a)
wavelength
b)
amplitude
c)
intensity
d)
brightness
67.
Which regions are in order of INCREASING wavelength?
a)
gamma, UV, radio
b)
x-ray, UV, gamma
c)
microwave, infrared, visible light
d)
radio, visible light, gamma
68.
The lens shown in the diagram
a)
is a converging lens
b)
can not be used in magnifying glasses
c)
is a diverging lens
d)
acts like a mirror when the object is far away
69.
When a prism has visible light passing through it that is white as shown in the diagram
a)
the white light will spread out into different lines
b)
the different colours that make up white light will take different paths through the prism
c)
violet light bends the least
d)
red light travels along the dotted line
70.
The reading shown on the micrometer is:
a)
6.48 mm
b)
6.20 mm
c)
6.02 mm
d)
5.98 mm
71.
The SI unit for density
a)
kgm-3
b)
kgm3
c)
kg3m
d)
kg-3m
72.
For a system to be in equilibrium the sum of the forces acting must equal zero and 
a)
clockwise moments = anticlockwise moments
b)
the sum of the velocities must equal zero
c)
the sum of the momentums must equal zero
d)
all work must be done around a pivot point
73.
The instrument pictured is used to measure
a)
electric current
b)
electric charge
c)
voltage
d)
resistance
74.
Electrons move inside metal wires from
a)
negative to positive terminals
b)
positive to negative terminals
c)
both ways
d)
none of these
75.
A fuse protects 
a)
circuits from overheating and catching fire
b)
people from getting electric shocks
c)
transistors from large voltages
d)
all of these
76.
The circuit pictured has 2 resistors connected in _________. If each resistor value is 40 Ohms, the total resistance in this case will be ___Ohms.
a)
parallel, 20
b)
series, 20
c)
parallel, 80
d)
series, 
77.
Heat transfer occurs:
a)
in many directions
b)
both from warm objects to colder ones and from cold objects to warmer ones
c)
only from warm objects to colder ones
d)
only from cold objects to warmer ones
78.

What happens when two forces act in the same direction?

a)

They cancel each other out.

b)

The stronger one prevails.

c)

Their strengths are added.

d)

Their sum divided by two is the total force.

79.
Person on the left = 45 N
Person on the right = 32 N
What is the net force?
a)
zero N
b)
10 N
c)
77 N
d)
13 N
80.

If the acceleration of an object is zero, then which of the following statements are possible in describing its motion?

a)

Object is moving with constant velocity

b)

Object is at rest

c)

Forces acting on the object are balanced

d)

All of above

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