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WorksheetsRevision - Unit 4 - Energy
Total questions: 34
Worksheet time: 17mins
Can you see and touch energy?
Yes
No
Can you store and transfer energy?
Yes
No
Kinetic, Thermal, Chemical, Gravitational potential, Elastic potential, Electrostatic, Magnetic, Nuclear.
The following are ...
Energy stores
Energy transfers
Mechanically , Electrically, Heating , By radiation,
The following are ...
Energy stores
Energy transfers
A?
Nuclear store
Chemical store
B?
By heating
Mechanically
Electrically
C?
Kinetic
GPE
Thermal and visible light
A?
Kinetic
Thermal
Chemical
GPE
7?
Chemical
Nuclear
Thermal
Elastic
Energy is transferred ... from the mains to the thermal store of the heater.
mechanically
electrically
by heating
Energy is measured in ...
Joules
Watts
Coulombs
Dissipated energy is ...
useful
wasted
Efficiency =
20%
80%
10%
Efficiency?
25%
75%
30%
Is this device efficient or not efficient?
Efficient
Not efficient
Which appliance loses more energy?
Appliance A
Appliance B
Both are the same
Work =
Force X density
Friction X distance
Force X distance
Work is ...
The energy transferred from one object to another.
The energy stored in an object.
Work = energy transferred, therefore, work is measured in ...
Watts
Coulombs
Joules
Amps
If I push a table with 10 N of force, and the table doesn't move, how much work have I done?
10 Joules
0 Joules
The mass of the box is 10 kg, and gravity is 10 m/s2.
How much work must I do to lift the box 1 meter?
10 Joules
100 Joules
1'000 Joules
A man lifts a mass of 120 kg to a height of 2.5 m. How much work did he do?
30 J
300 J
3000 J
Dan applies 40 J of work to lift an object.
What is the PE of the object at the top?
0 J
40 J
400 J
What is the resultant force?
30 N to the left
30 N to the right
90 N to the left
90 N to the right
What is the resultant force?
20 N to the left
20 N to the right
40 N to the left
40 N to the right
A rock weighing 100 kg is flying through space at 70'000 m/s. What is the resultant force acting on this rock?
7 million N
0 N
Calculate the work done by the car in 2 seconds.
24 000 J
0 J
What does this graph show?
An object falling to the ground.
An object being thrown upwards.
What movement does this graph show?
An object falling to the ground.
An object being thrown upwards.
This graph shows the conservation of energy for a falling rock.
GPE at the start = KE at the end
GPE and KE at the start are equal.
What is power?
The total energy stored.
The rate of doing work.
They have the same energy, but who has more power?
Mo Farah
Usain Bolt
1) This dam has more power.
2) This dam has more energy.
1 = A
2 = B
1 = B
2 = A
Power is measured in ...
Joules
Coulombs
Watts
Amps
