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Work Vocabulary
Energy Vocabulary
Equations
Math Problems
General
100

The transfer of energy to an object by the application of a force that causes the object to move in the direction of the force.

What is work?

100

The capacity to do work.

What is energy?

100

Work

What is WD=Fd

100

A crane uses an average force of 5,200 N to lift a girder 25 m. How much work does the crane do on the girder?

What is 1.3 X 10^5 J or 130,000 J?

100

A law that states that energy cannot be created nor destroyed.

What is the Law of Conservation of Energy?

200

A quantity that measures the rate at which work is done or energy is transformed.

What is power?

200
The energy that an object has because of the position, shape, or condition of the object.
What is potential energy?
200
Power
What is P=W/t
200
An apple weighing 1 N falls a distance of 1 m. How much work is done on the apple by the force of gravity?
What is 1 J?
200

A force that does negative work on a braking car

What is friction?

300
A quantity that expresses how much a machine multiplies force or distance.
What is mechanical advantage?
300
The energy of an object due to the object's motion.
What is kinetic energy?
300
Mechanical Advantage Equation
What is mechanical advantage = output force/input force = input distance/output distance
300
While rowing across the lake during a race, John does 3,960 J of work on the oars in 60 s. What is his power output in watts?
What is 66 W?
300

The formula for change in gravitational potential energy

What is PE=mgh?

400
One of the six basic types of machines, which are the basis for all other forms of machines.
What is simple machine?
400
The amount of work an object can do because of the object's kinetic and potential energies.
What is mechanical energy?
400
Potential Energy Equation
What is PE = mgh
400
Calculate the gravitational potential energy of a 1,200 kg car at the top of a hill that is 42 m high.
What is 4.9 X 10^5 J or 490,000 J?
400

True or False: No machine is 100% efficient.

What is true.

500
A machine made of more than one simple machine.
What is compound machine?
500
A quantity, usually expressed as a percentage, that measures the ratio of useful work output to work input.
What is efficiency?
500
Kinetic Energy Equation
What is KE = 1/2 mv^2
500
A 35 kg child has 190 J of kinetic energy after he sleds down a hill. What is the child's speed at the bottom of a hill?
What is 3.3 m/s?
500
A process used by nuclear power plants to release energy, by splitting a single large nucleus into two smaller nuclei.
What is nuclear fission?