Potential energy is energy that is _______________.
What is stored or waiting?
100
Kinetic energy is energy that is ___________________.
What is moving?
100
Ice melting
What is physical?
100
A car travels 450 miles in 6 hours. What is its average speed?
What is 75 mph?
200
A machine that is made of a wheel with a rope that goes around it. When you pull down on one side, the load on the other side is lifted.
What is a pulley?
200
Where an object has the most gravitational potential energy.
What is when it is the highest?
200
If I fall from the roof of the school building, when will I have the MOST kinetic energy?
What is right before I hit the ground (or at the lowest point)?
200
Sugar dissolving
What is physical?
200
The formula for average speed.
What is total distance/total time?
300
What would you have to do to a pulley to decrease the amount of force needed to lift an object?
What is add more wheels (pulley system)?
300
When a bird falls from a tree, its potential energy ______________.
What is decreases or turns into kinetic energy?
300
When something's potential energy decreases, its kinetic energy _________________.
What is increases?
300
Formation of a precipitate (a solid that forms when 2 liquids are combined)
What is chemical?
300
Look at the graph. What was the speed of the object at 2 seconds?
What is 4 m/s?
400
Inclined plane A is 30 cm long. Inclined plane B is 60 cm long. Both planes are used to lift the same object to a height of 20 cm. Which plane requires LESS force?
What is plane B?
400
Which is NOT an example of potential energy?
compressing a spring,
releasing a spring, or
standing on a diving board
What is releasing a spring?
400
Which is NOT an example of kinetic energy?
electricity flowing in a circuit, compressing a spring, or running a marathon?
What is compressing a spring?
400
Give 3 pieces of evidence a physical change has happened.
What is change in size or shape, dissolving, change in state?
400
Look at the graph. What was the average speed of the object?
What is 5 m/s?
500
IF you use an inclined plane, you are able to use less force, but you cover more _______________.
What is distance?
500
Study the diagram. Where is the potential energy the greatest?
What is letter W?
500
An apple is falling from a tree. It is almost at the ground. It has 20% potential energy. What is its percentage of kinetic energy?
What is 80%?
500
Give 3 pieces of evidence that a chemical change has occurred.
What is production of gas, production of a precipitate, temperature change, or color change?
500
Study the table on your review sheet. What is the average speed of the object?