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WorksheetsAQA GCSE PHYSICS - ENERGY
Total questions: 52
Worksheet time: 26mins
Gravitational potential energy is stored when an object is …
heated
stretched
lifted
accelerated
Which of these statements is true about energy in general?
Energy can be created
Energy can be destroyed
Energy can be defined
Energy can be transferred
Kinetic energy can be calculated using the equation Ek= ½ mv2
In this equation 'v' is …
velocity
energy
mass
weight
If the amount a spring is stretched doubles, the elastic potential energy stored will …
halve
stay the same
double
quadruple
Which of these is NOT a definition of power?
Rate of doing work
Rate of energy transfer
Rate of change of velocity
Joules transferred per second
Which of these units is the equivalent to thousands of joules?
millijoules
megajoules
microjoules
kilojoules
To calculate kinetic energy gained using the equation Ek= ½ m v2, mass must be in …
grams
tonnes
kilograms
newtons
Which unit is energy measured in?
kilograms
watts
joules
newtons
A spring with spring constant 25N/m is stretched 10cm.
Using the equation Ee=½ k e2, the stored elastic potential energy is …
0.125 J
12.5 J
25 J
1250 J
Which of these processes is NOT reduced by insulation?
conduction
distillation
convection
radiation
Elastic potential energy is stored when an object is …
heated
stretched
lifted
accelerated
Which of these efficiency values is the lowest?
20%
0.02
0.02%
20
A kettle rated as 2200W takes 2 minutes to boil.
The energy transferred equals …
4400 W
264 000 W
4400 J
264 000 J
If a material has a high thermal conductivity it will be …
a good insulator
a poor insulator
a poor conductor
a good reflector
A device transfers energy for 2 hours.
In an equation to calculate the power of the device, the value for t should be …
120
2
720
7200
An object is dropped freely and loses 500J of gravitational potential energy.
As a result, there is …
a 500 J gain in thermal energy
a 500 J gain in kinetic energy plus an additional gain in thermal energy
a 500 J gain in kinetic energy and thermal energy combined
a 500 J loss of kinetic energy
A car of mass 800kg accelerates from rest to 20m/s.
Using the equation Ek=½ m v2, the gain in kinetic energy is …
8000 J
16 000 J
160 000 J
320 000 J
Using the equation P=E/t, which unit must the value for t be in?
minutes
seconds
hours
it doesn't matter
Which of these is NOT an energy store?
Kinetic energy
Light energy
Thermal energy
Gravitational energy
An LED bulb transfers 200J of energy in 20s. Its power rating is …
200 W
20 W
10 W
1 W
Gravitational potential energy is measured in …
joules
newtons
kilograms
metres per second
A 5kg bag falls a vertical height of 10m before hitting the ground.
Ek=½ mv2 and Ep = m g h (assume g = 9.8N/kg).
Using these two equations, calculate the speed the bag reaches just before it hits the ground.
5 m/s
10 m/s
14 m/s
28 m/s
Which of these renewable resources still has links to climate change?
solar power
hydroelectric power
biogas
tidal power
Kinetic energy is gained when an object is …
heated
stretched
lifted
accelerated
Kinetic energy is measured in …
joules
newtons
kilograms
metres per second
Efficiency tells us …
how well a device transfers useful energy
how well a device wastes energy
how well a device loses energy
how modern a device is
Elastic potential energy is measured in …
joules
newtons
kilograms
metres per second
How does a petrol-fuelled car waste most energy?
As sound energy
As thermal energy
As electrical energy
As vibrational energy
The law of conservation of energy states that …
energy is always constant
energy cannot be transferred or created, only destroyed
energy cannot be created or destroyed, only transferred
energy cannot be transferred, only created and destroyed
Two electric scooters have the same mass.
Scooter A has a 900W motor. Scooter B has a 500W motor.
Which of these statements is definitely true
Scooter A is quickest to reach a speed of 10 m/s
Scooter B is quickest to reach a speed of 10 m/s
Scooter A is more streamlined
Scooter B is more streamlined
Elastic potential energy can be calculated using the equation Ee=½ke2
In this equation 'k' is …
extension
energy
gravitational field strength
spring constant
Gravitational potential energy can be calculated using the equation Ep=m g h
In this equation 'g' is …
extension
energy
gravitational field strength
spring constant
As you get further from Earth's surface, the gravitational field strength
decreases
remains constant
increases
becomes infinite
Which of these four would be the best insulated cup?
A polystyrene cup with a lid
A polystyrene cup with no lid
A metal cup with a lid
A metal cup with no lid
A sprinter of mass 70 kg accelerates from 2 m/s to 9 m/s.
Using the equation E = ½ m v2 , their gain in kinetic energy equals …
5390 J
2695 J
2835 J
1715 J
Which of these is NOT a possible value for the efficiency of a device?
0.25
25
25%
2.50%
The equation to calculate power is …
P = E/t
P = E x t
P = E + t
P = t/E
On Earth the value for 'g' is taken as being …
0.98 N/kg
9.8 N/kg
98 N/kg
980 N/kg
Efficiency can never be …
zero
positive
100%
a fraction
When an energy transfer occurs in a closed system, the total energy …
remains constant in the same forms
remains constant but in different forms
increases overall
decreases overall
An object is heated. Heating will ALWAYS cause an increase in …
temperature
internal energy
state
density
An LED bulb transfers 120J of electrical energy every second and gives out 80J of light energy each second.
The efficiency of this bulb is …
1.5
150%
0.67
6.70%
The correct equation for kinetic energy is …
E = m x v x v
E = 0.5 x m x v x v
E = m x v
E = 0.5 x m x v
Which of these is NOT a fossil fuel?
Coal
Uranium
Natural gas
Oil
A person of mass 50 kg climbs a wall 5 m high. Assume that g=9.8N/kg.
How much gravitational potential energy have they gained?
2450 J
250 J
490 J
24.5 J
Which of these is a renewable resource?
Uranium
Wind
Coal
Oil
The equation Ee=½ ke2 applies, assuming the limit of proportionality has not been …
reduced
increased
withheld
exceeded
Which of these does the gain in gravitational potential energy for an object NOT depend upon?
The height the object is lifted
The mass of the object
The surface area of the object
The gravitational field strength where the object is
Which of these values is NOT the same as 50 000 000J
50 MJ
50 000 kJ
0.05 GJ
50 GJ
Using the equation Ep = m g h relies on the gravitational field strength being …
small
constant
variable
large
'Renewable' in the phrase 'renewable energy' means …
can be used more than once
is very efficient
can be turned into other energy forms
can be replaced as it is used
Two identical buildings are built, but one has thicker insulation fitted into the walls.
This means it will …
be more expensive to heat in winter
cool quicker from a given temperature
cost less to build
cool less quickly from a given temperature
