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WorksheetsYear 8 Revision
Total questions: 15
Worksheet time: 12mins
The law of conservation of energy applies to everything - even when energy transforms
True
False
A gas stove converts ______ energy into thermal energy
chemical
electrical
nuclear
mechanical
An electric stove transform ______ energy into thermal energy
chemical
electrical
thermal
nuclear
Potential energy depends on ______ and _______.
height, mass
weight, mass
speed, mass
height, speed
Energy that transforms from potential to kinetic is neither_____ nor _______.
created, force
created, destroyed
force,motion
destroyed, law of conservation of energy
When stored energy begins to move the object______ energy from _______ to _________.
energy, force, motion
transfers, kinetic, potential
forces, mechanical, nuclear
transfers, potential,kinetic
What kind of energy does a marble at the top of a hill have?
gravitational potential
chemical potential
kinetic
thermal
What is the correct unit for energy?
meters (m)
kilogram meters per second (kg m/s)
Newtons (N)
Joules (J)
Calculate the potential energy of a car with a mass of 2,500 kg that is on a hill 100 meters above sea level.
250,000 J
2,450,000 J
2,451,663 J
248 J
A 5 Kg body is having a Kinetic energy of 250 J. What is the velocity (or speed) of the body?
10 m/s
15 m/s
20 m/s
40 m/s
A exercise ball is on a table 2.5 m above the ground. What is the mass of the ball if it has a GPE of 56.8 J?
71 kg
22.72 kg
142 kg
2.32 kg
