@What units are work measured in?
Joules
Newtons
Watts

@The energy an object has because of its height above ground level is called:
Potential energy
Kinetic energy
Displacement energy

@A moving object has what kind of energy?
Kinetic
Potential
Inertia

@What does the Law Of Conservation Of Energy say?
Only the form of energy can be changed
Energy can be created and destroyed
Energy can only be created

@What is the unit of power?
Watt
Joule
Pascal

@1 Watt is:
The rate of using energy at a rate of 1 Joule per second
Moving 1 Kg a distance of 1 m
Lifting a 1Kg mass up 1 m in 1 minute

@Kinetic energy depends on:
mass and velocity
mass only
height and gravity

@In most machines much of the supplied energy is wasted. Why is this?
Friction coverts it to heat
They are not designed very well
They use fossil fuels

@Three types of potential energy are:                                  
Gravitational, elastic & chemical
Chemical, friction & heat
Elastic, kinetic & gravitational

@Where does nearly all the energy used on the planet originate?
The sun
From oil and coal
From chemical reactions

@Electrical energy is often quoted in megawatts? How many watts are there in 1 megawatt?
1 million
1 thousand
10 thousand

@How many kilowatts is 2500 watts?
2.5
25.0
0.25

@The law of conservation of energy means:
energy can't be created or destroyed
energy must not be wasted
the worlds supply of fossil fuels is running out and can't be replaced

@In which of the following statements is a force doing work?
Railway engine pulling its carriages
A book resting on a table
A nail hanging from a magnet

@Which requires the most amount of work to be done - using a 1N force to lift an object 1m or using a 1N force to slide the object 1m along the floor?
They both require the same
Lifting the mass
Pushing the mass

