Energy Transformations
Burning a candle.
Chemical energy -> heat energy + light energy
What is the net force of balanced forces?
Zero Newtons
What is the process of saving up or storing energy?
Potential energy.
Energy that has the ability to fall; this type of energy increases the higher up you go.
Gravitational potential energy.
What is an object's resistance to a change in motion?
Inertia
Using a hot plate to boil water.
Electrical energy -> heat energy
How do you calculate the net force of unbalanced forces working in the same direction?
Add
What is the process of spending energy or energy in motion.
Kinetic energy.
Stored in the bonds of compounds.
Chemical energy.
What effect does friction have on the motion of objects?
A hungry football player eating a large sandwich to use the food for energy.
Chemical energy -> mechanical energy
One team pulls a tug-of-war rope to the left with 200 N of force. The opposing team pulls with 100 N of force. What is the net force on the rope?
100 N left
A heavy vase on a table has this type of energy.
(Gravitational) potential energy.
Energy of moving electrons.
Electrical energy
What two things effect the gravitational force between objects?
Mass and distance.
Using a solar-powered calculator.
Radiant energy -> electrical energy ->light energy
A rope is attached to a block that has a weight of 120 N. When the rope exerts an upward force of 250 N on the block, what is the net force on the block?
130 N up.
A person running down the sidewalk has this type of energy.
(Mechanical) kinetic energy.
This type of energy is caused by vibrations
Sound energy.
A battery-powered cart pulls an 800 g load across the floor. If the load were reduced to 400 g, and the force used to move the cart remained the same, what would happen to the cart?
It would accelerate and move faster.
A solar panel on the roof of a building used to heat and cool the building.
Radiant energy -> electrical energy
Which of the following is an example of an object that could have a net force greater than zero acting on it?
a. A glass resting on a table.
b. A ball rolling down a ramp.
c. A ladder leaning against a wall.
d. A toy car moving east at a constant speed.
B - A ball rolling down a ramp.
Where does a roller coaster have the most potential energy?
Where does a roller coaster have the most kinetic energy?
At the highest point (top of the hill)
At the lowest point (bottom of the hill)
Energy stored in the nucleus of an atom.
Nuclear energy
List each of Newton's three laws of motion.
1. An object at rest will remain at rest and an object in motion will remain in motion unless acted on by an unbalanced force.
2. F=ma
3. For every action there is an equal and opposite reaction.