Potential and Kinetic Energy
The energy stored in an object.
What is Potential Energy?
When an object is not sitting still.
What is motion?
A push or a pull.
What is a force?
A student rolls a ball on the ground. What causes the ball to slow down and then stop?
Friction on the ground
A force that pulls things down
What is gravity?
The energy an object has when it is in motion.
What is Kinetic Energy.
A force that is created when 2 surfaces try to move against each other.
What is friction?
Using force to move an object.
What is work?
Tom is riding his bike. He has to put on the brakes when a car pulls out. How do brakes reduce the bikes motion?
They reduce all of the forces on the bike.
The sum of forces acting on an object.
What is net force?
Potential or Kinetic?
Windmills
What is Kinetic Energy?
How much speed changes in a given time.
What is acceleration?
A force to move something away.
What is a push?
What does friction create?
heat
In a pair of forces, the first force is sometimes call an action force, and the second force is sometimes called _________.
What is the reaction force?
Potential or Kinetic.
A Child sitting at the top of a slide.
What is Potential Energy?
An object at rest tends to stay at rest and an object in motion tends to stay in motion
What is inertia?
A force to move something towards you.
What is a pull?
Rougher surfaces have more or less friction?
More
The person who discovered some laws that still apply to the things you do, see, and feel every day.
Who is Isaac Newton?
Two objects with different masses are placed on the same shelf. Which object contains more energy?
The object with more mass.
To describe this car’s motion, a student should use its — (two answers)
direction and speed
The combination of all forces acting on an object is ______ ___________.
net force
A ball was kicked in a soccer game. What would happen if we didn't have friction?
The ball would continue at the same speed.
If two balanced forces go toward an object in opposite directions what is the net force?