WorksheetsPhysics Practice Questions - ATPL8
Total questions: 60
Worksheet time: 58mins
How much work must be done by a force on a 100kg body in order to accelerate it from 0 to 20 m/s in 10 seconds?
2 × 10³ J
4 × 10³ J
2 × 10⁴ J
4 × 10⁴ J
A railway truck with a mass of 10000kg rolling at 5m/s collides with a stationary truck of mass 12500kg. The trucks join together. At what speed do they move after the collision? Note: we shall assume that friction forces are small enough to ignore, so we can apply the law of conservation of momentum.
2.2m/s
3.5m/s
1m/s
Cannot be determined
An engine reaches its top speed from rest in 7.5s. It is able to perform 250,000J of work in that time. The power of the engine is _________.
1.8kW
33.3kW
298kW
41kW
If 150 Joules of work is needed to move a box 10m, what force was used?
1500N
15N
1.5N
150N
Fahrenheit may be converted to Celsius by using the equation
C° = 95 (F° - 32)
C° = 95 F° - 32
C° = 95 F° + 23
C° = 59 F° + 32
The slope of a velocity time graph represents the _________.
Velocity of the object
Displacement of the object
Acceleration of the object
Momentum of the object
A fluorescent lamp is 25% efficient. Choose the statement that correctly describes how the lamp performs.
25% of the energy supplied to the lamp is lost along the way.
25% of the energy supplied to the lamp is transferred to light.
75% of the energy supplied to the lamp is transferred to light.
The lamp is not working properly.
A mass of 500kg moves 42m with a force of 85N. What is the work produced?
3570J
210000J
10800J
None of the above.
The stability of a body is increased by _______________________________.
raising the position of its CoG and decreasing the width of its base
lowering the position of its CoG and increasing the width of its base
increasing the mass of the body
raising the position of its CoG and increasing the width of its base
lowering the position of its CoG and decreasing the width of its base
If you push an object with force of 8N for 12m in 6s, how much power is used?
18W
16W
30W
24W
The prefix 'n' (nano) means the quantity times ____.
0.1
1
10^-9
0.01
What force is required to produce an acceleration of 12.5m/s² on a mass of 240kg?
1000N
1250N
3000N
2500N
A bus of mass 4000kg starts from rest and rolls down a hill. If it travels a distance of 400m in 10s, calculate the acceleration of the bus.
20000m/s²
8m/s²
None of the options.
25m/s²
How long will it take a car moving at 1600km/hr to travel 80km?
80s
180s
180 min
1.8s
If a car travels 24km in half a minute, what is the car's velocity in m/s?
800 m/s
1040 m/s
84 m/s
20 m/s
What is the momentum of a ball of mass 7g and has a velocity of 10cm/s?
70 kgm/s
0.0007 kgm/s
70000 kgm/s
None of the options.
An elevator weighing 595N is to be lifted up at a constant velocity of 5m/s. What should be the minimum horsepower of the motor to be used?
None of the options.
0.4 hp
4 hp
3.5 hp
The Law of Conservation of Energy states that ________________.
energy cannot be created or destroyed and cannot change its form
energy cannot be created or destroyed, but can change its form
energy can be created or destroyed, but cannot change its form
energy can be transferred or transformed, but cannot be created or destroyed
energy can be created or destroyed, but can change its form
Two cars set out along highway at the same time, car A travels at an average speed of 165km/h and car B at an average of 105km/h. How far apart are the two cars after 2 hours and 6 minutes?
60km
40.5km
126km
48.5km
How much work is done when an engine generates 200W in 25s?
5MJ
5kJ
500MJ
15J
How does temperature affect the density of a gas at the SAME altitude or height?
Density is not affected by changes in temperature.
Density only changes with extremely cold temperatures.
Density increases with an increase in temperature.
Density decreases with an increase in temperature.
What is the SI unit of density?
kilogram per cubic meter
kilogram per square meter
kilogram per square kilometres
kilogram per cubic kilometres
Newton's first law of motion states that ______________________.
None of the answers are correct
For every action, there is always an equal and opposite reaction
The body continues to be in its state of rest or of uniform motion along a straight line, unless it is acted upon by some external force to change the state
Objects in motion tend to speed up unless acted upon by an external force
The rate of change of linear momentum of a body is directly proportional to the external force applied on the body; and this change takes place always in the direction of the force applied
A roller coaster speeds along a track with considerable momentum. If a different roller coaster travels at six times the speed but one-third the mass of the first roller coaster, its momentum would be ________.
half as much
twice as much
unchanged
four times as much
zero
Which of the following is the unit of Force?
kgm/s
Nm/s
kgm/s²
cm/s
What is the moment produced by the 15N force?
15Nm clockwise
150Nm anti-clockwise
1.5Nm anti-clockwise
0.15Nm clockwise
Heat transfer by radiation _______________________.
requires a medium to transfer heat
does not occur from light bulbs - they are too bright
does not require any material between the radiator and the object receiving the radiation
None of the options.
is the same as conduction
A machine with an efficiency of 60% raises a load of 150N vertically to a height of 10m. The work input to the machine is __________.
1500J
2500J
525J
500J
Calculate the amount of work done in raising a glass of milk weighing 800g through a height of 40cm.
10000J
3.2J
1J
32KJ
A 10kg object experiences a horizontal force which causes it to accelerate at 3m/s², moving it a distance of 50m, horizontally. How much work is done by the force?
2000J
80J
40J
1500J
Explosions happen when the total momentum of the objects add up to zero.
True
False
A child pulls a snow-covered sled up a hill. If he does 2666J of work on the sled and walks 43m up the hill, how large of a force must the child exert?
6227N
47N
6075N
62N
Which of the following is NOT a method of heat transfer?
Convection
Radiation
Conduction
Condensation
Laura goes for a cycle from her house to the post office 4km away. Refer to the graph to work out Laura’s speed cycling back home.
12 km/hr
12 mm/h
16 m/s
4.4 km/h
If a body starts at rest and reaches 80m/s in 4s, its acceleration is ___________.
252m/s²
120m/s²
20m/s²
None of the options.
A constant retarding force of 50N is applied to a body of mass 20kg moving initially with a speed of 15m/s. How long does the body take to stop?
2.5s
−2.5s
6s
5s
If the velocity of tripled of an object, the centripetal force will ________________.
quadruple
increase by a factor of 9
halve
stay the same
The smallest building block of matter is called __________.
atom
molecule
crystal
element
Where is the magnetic field strength the strongest?
A
B
C
Potential difference between terminals is also known as the difference in _____________.
electric pressure
charge
current
electric density
A subsonic aircraft is travelling __________ the speed of sound.
above
below
at
not enough information provided
The galvanometer gives _______ voltage readings for a DC generator.
positive
negative
positive and negative
zero
An AC generator is also known as __________.
alternator
dynamo
motor
transformer
Two busses set out on a journey in opposite directions. Bus A travels at an average speed of 150KPH and bus B travels at 120KPH. How far apart are the two busses after 2hrs and 15mins?
607.5km
67.5km
718.6km
342.8km
Match the following circuit symbols with the correct components.
Cell
Resistor
Bulb
Ammeter
True or False. Gasses are incompressible.
True
False
Which height indicates the atmospheric pressure in the given mercury barometer?
A
B
C
D
EMF induction takes place because of changing ___________.
magnetic field
resistance
temperature
current
Convert 2750L into m³.
2.75 cubic meter
27.5 cubic meter
0.275 cubic meter
None of the answers is correct.
Hydraulic machines are:
Distance multipliers
Use hydraulic fluid because it is compressible
All are correct
Increase force at the same ratio of the area of the pistons
What is the work done in moving a charge of 5 C across two points with a potential difference of 4 V?
20 J
15 J
10 J
25 J
A sample of gas at a temperature of 20°C has a volume of 40 cm³ at a pressure of 2 x 10⁵ Pa. If the pressure is increased to 6 x 10⁵ Pa while the temperature is raised to 30°C, what will the new volume be?
13.4 cm³
13.8 cm³
10 cm³
13.5 cm³
A heater is supplied with 5000 J of electrical energy and produces 1500 J of thermal energy. What is the efficiency of the heater?
30%
25%
None of the answers is correct
35%
How much work is done in lifting a 1500 kg object to a height of 50 meters? (Assume g=10 m/s²)
750 KJ
600 KJ
7500 J
75 KJ
Which container has the highest liquid pressure at it's base?
A
B
C
D
They all have the same pressure at their bases
Two masses of mass 10.0 and 6.0 kg are hung from massless strings at the end of a light rod. The rod is virtually weightless. A pivot (fulcrum) is placed off center and the system is free to rotate. If the 6.0 kg mass is 4.0 m away from the pivot, how far away is the 10.0 kg mass if the system is not rotating?
0.42 m
2.4 m
4.8 m
4.2 m
Given the velocity time graph of a moving object. Find the distance covered during motion.
150m
84m
138m
None of the answers is correct.
If a constant force is applied, how does mass affect acceleration?
Acceleration is directly proportional to mass
Acceleration is inversely proportional to mass
Mass and acceleration are independent
None of the above
500 kts equals to:
926 km/hr
926 mph
1852 km/hr
None of the answers is correct.
If an aircraft is loaded with cold fuel, its range will:
Increase
Decrease initially
Decrease
Range is unaffected by fuel temperature
