Vocabulary
the change in the position of an object, an object's direction & speed.
Motion
There is less friction on a _______ surface.
Smooth
If you kick a soccer ball, what type of energy is happening?
Kinetic Energy
To put an object in motion, you have to _______.
Apply a force
Energy can be destroyed.
True or False
False
the ability to do work
Energy
What causes a ball to fall to the ground?
Gravity
What is potential energy?
a. moving energy
b. stored energy
c. energy that was just released
b. stored energy
The amount of matter in an object.
Mass
The more force you use to push an object, the more it will accelerate.
True or False
True
any push or pull that causes an object to move, stop or change direction, speed, or shape.
Force
The more massive the object, the _______ the force needs to be.
Greater
Choose all the following that are true...
a. energy can be created
b. energy can be transferred
c. energy can be transformed
b & c
What is the type of energy associated with moving parts? Example: a Blender
Mechanical Energy
Friction is a force that works against the motion of an object.
True or False
True
If there is a car crash, what best describes what occurred?
a. there was very little friction
b. there was a collision between the cars
c. there was no net force
b. there was a collision between the cars
What is net force?
Net force is all forces acting on an object.
(the overall force acting on an object when all forces are combined)
What is net force?
Net force is all forces acting on an object.
(the overall force acting on an object when all forces are combined)
Which item would have more mass, a pool inner tube or a watermelon? Why?
A watermelon, because it is a solid and contains more atoms (matter)
Turning on an electric stove is an example of electrical energy is being transferred?
True or False
False
Energy is transformed into thermal energy
What happens to the energy of objects when they collide?
Mrs. Sparks' car broke down. She tried pushing the car, but it wouldn't move. Her husband got out of the car and helped her. Together they were able to push the car to the side. Why wasn't Mrs. Sparks able to move the car by herself?
The car has a lot of mass. This means you need more force to move it. Together, Mrs. Sparks and her husband had more force and were able to move the car.
Choose all that apply about potential energy...
a. A car running a red light
b. Someone preparing to start swinging on the swings at recess.
c. Someone kicking a ball.
d. A pencil moving.
e. A gymnast swinging on a bar.
f. A bike at a stoplight.
b & f
Describe Newton's 3 laws of motion.
1. Object's at rest will stay at rest unless acted upon by a force. Objects in motion will tend to stay in motion unless acted upon by a force.
2. The greater the force the greater the change in motion will be.
3. For every action, there is an opposite and equal reaction.
An object adds to a zero net force when it's at rest and has many forces acting upon it.
True or False
True
For example, a book on a table. The force of gravity pulls the book towards the floor but the normal force pushes the book upward from the surface of the table. These are equal in strength and are in opposite directions so they cancel each other out to zero and the book doesn't move.