work and energy

What is energy ?

• the amount of charge stored in an object

• the force on one kilogram of matter

• the work done per second

• The ability to do work

What units are used to measure energy?

• Watts

• Amperes

• Joules

• Volts

Which of the following is not a type of energy?

• Light

• Power

• Heat

• Sound

What kind of energy do power stations convert other forms of energy into?

• Heat energy

• Chemical energy

• Electrical energy

• Kinetic energy

What is done during the energy conversion process in plants?

• light energy is converted into chemical energy

• light energy is converted into kinetic energy

• chemical energy is converted into light energy

• kinetic energy is converted into chemical energy

What is chemical energy?

• energy stored when electrical charge is stored in a capacitor

• energy stored when an object is raised to a greater height

• energy stored when a material is deformed

• energy stored in the bonds within molecules

What is gravitational potential energy?

• energy stored when electrical charge is stored in a capacitor

• energy stored when an object is raised to a greater height

• energy stored when a material is deformed

• energy stored in the bonds within molecules

Which of the following is not a form of potential energy?

• Chemical

• Heat

• Elastic

• Potential

A combination of two or more simple machine is a …………..

• Compound machine

• Mechanical advantage

• Efficiency

• Lever

The ratio of the output force to the input force is the ............ of a machine

• Efficiency

• Mechanical advantage

• Power

• Energy