Show:
motion
machines
gravity
types of energy
pushes and pulls
100
When does a child on a swing have the most potential energy?
At the highest point in the swing
100
Something that makes work easier is a _________
machine
100
A force that pulls any two object together is called_________
gravity
100
Give an example of an object that uses chemical energy.
anything with a battery
100
A friend serves a volleyball and you hit it back. A scientist would say that you have used__________
force to change the direction of the ball
200
When an object begins to move, potential energy changes to
kenetic energy
200
When you cut with a knife, you are using a simple machine called a ________
wedge
200
Your weight is the measure of the force of ________
gravity
200
To a scientist, energy means _____________________
the ability to do work
200
Isaac Newton discovered that a moving object will____________________________
continue in a straight line until a force causes it to slow down or stop
300
Kenetic energy is energy of______________.
motion
300
What simple machine would you use to move a heavy box up a ramp?
inclined plane
300
An astronaut weighs less on the moon than on the Earth because____
the moon has less gravity than Earth
300
Pedaling a bicycle is which type of energy?
mechanical energy
300
You are doing work when you____________
anything that uses force is an acceptable answer
400
A force is something that causes an object to change its _________.
motion
400
A compound machine is something that contains________
more than one simple machine
400
The effect of the force of gravity is most closely related to an object's________
mass
400
Energy from the sun is called____________________
solar energy
400
The tendency for an object to keep moving or a resting object to stay still is called_____
inertia
500
A push or pull that causes something to change its motion is a_____
force
500
A complex machine uses____________
many simple and compound machines
500
The force that slows down moving objects is called _______
friction
500
when you plug your toaster in, you are using _________ energy.
electrical
500
The brakes on inline skates work because of ________
friction