science chapter 13 section 2 Forms of Energy

If kinetic energy of a falling apple is 5.2 J and its potential energy is 3.5 J, what is its mechanical energy?

8.7J

Give an example of mechanical energy

A football thrown by a quarterback

Give an example of thermal energy

A volcano with lava flowing through

What kind of energy do you experience when you get a shock from a metal doorknob?

electrical

What SI unit is used to measure mechanical energy?

joules

What two forms of energy are associated with mechanical energy?

potential and kinetic energy

How would you calculate an object's mechanical energy?

potential energy plus kinetic energy

chemical energy

potential energy stored in chemical bonds that hold chemical bonds together

Give an example of nuclear energy

stored in the nucleus of an atom

electrical energy

the energy of electric charges

mechanical energy

the form of energy associated with the position and motion of an object

thermal energy

the total potential and kinetic energy of the particles in an object

List the five forms of energy associated with the particles that make up objects.

thermal energy electrical energy chemical energy nuclear energy electromagnetic energy

true or false When the particles of an object move faster, its thermal energy increases

true

Give an example of electromagnetic energy

x-ray

If an object's mechanical energy is equal to its potential energy, how much kinetic energy does the object have? How do you know?

It would have zero kinetic energy because mechanical energy equals potential energy plus kinetic energy.

Why do particles of objects have both kinetic and potential energy?

Particles of objects have both kinetic and potential energy. Because particles are constantly in motion, they have kinetic energy. These particles are arranged in specific ways in different objects. Therefore, they also have potential energy.

electromagnetic energy

a form of energy that travels through space as waves. sunlight, x-ray, ultra-violet, infra-red radiation, microwave, radio waves

Give an example of electrical energy

a metal doorknob

nuclear energy

a type of potential energy stored in a nucleus atom

Give an example of chemical energy

atoms stored in food

What kind of energy do you experience when you eat a peanut butter sandwich?

chemical energy

What kind of energy is stored in the bonds in compounds of the food you eat?

chemical energy