Placing a dish on a higher shelf increases the dish's
What is potential energy
100
Work is done when....
What is (sample answer) you lift a pencil, lift a book, push open a door ...it must move
100
Friction between objects creates
What is heat
100
How fast an object's position changes over time is known as
What is speed
200
A knife is what type of simple machine?
What is a wedge
200
A soccer ball that has been kicked has what type of energy?
What is kinetic energy.
200
Newton's Second Law says that force is equal to...
What is mass X acceleration
200
The unit used to measure FORCE is...
What is a Newton
200
This is calculated by mass x velocity.
What is momentum
300
What simple machine is a seesaw known as?
What is a lever
300
A stretched spring has what type of energy?
What is potential energy.
300
Why is it harder to overcome the inertia of a bowling ball than a baseball?
What is the bowling ball has greater mass.
300
The force you apply to a simple machine is the...
What is effort
300
According to Newton's Law of Universal Gravitation, the force of gravity depends on...
What is mass x acceleration
400
Give an example and description of a second-class lever.
What is a shovel because it has a fulcrum on the ground.
400
Energy of a moving object.
What is kinetic energy.
400
The force of gravity between two objects decreases with...
What is distance
400
If a bicyclist is traveling forward with a force of 100 N but is putting out 30 N, what is the total force of the bicycle and rider?
What is 70 N
400
True or False. Acceleration refers to an increase in speed over time.
What is False.
500
Give examples of compound machines.
What is scissors.
500
Energy stored in the position of an object.
What is potential energy.
500
The force of gravity between objects increases with....
What is mass
500
When you do positive work, you ___________ the object's energy.
What is increase
500
If a machine is 50% efficient (double the work), how much energy must you apply to lift a 100-Newton weight a distance of 10 meters? (work=distance x force)