Newton's Laws
The number of Newton's laws of motion.
What is 3?
This causes a hockey puck to stop sliding across the ice.
What is friction?
Joe walked to school in 20 minutes. We need to know something else to find his speed.
What is the distance to the school?
Two forces acting in equal and opposite directions.
What are balanced forces?
A unit of force is this.
What is a Newton?
An object will not change its motion unless this acts on it.
What is a force?
This is a kind of friction that causes a feather to fall more slowly than a bowling ball.
What is air resistance?
A 4 kg ball and a 7 kg ball are rolled. One of them has more momentum.
What is the heavier ball?
On the moon one thing stays the same and the other changes.
What is mass and weight?
A push or a pull is considered this.
What is a force?
Newton's second law says that more mass equals more of this.
What is force?
This type of friction is objects sliding against each other.
What is sliding friction?
The tendency for something to resist a change in motion.
What is inertia?
Two forces where one force is stronger than the other.
What are unbalanced forces?
The movement of an object is this.
What is motion?
For every action, there is an equal and this type of reaction.
What is opposite?
This type of friction happens when a ball rolls on a surface.
What is rolling friction?
To calculate speed you need to know these two things.
What are distance and time?
This type of force pulls objects toward one another.
What is gravity?
The amount of matter in an object
What is mass?
When a person pushes a skateboard, it is an example of this law.
What is Newton's third law?
This type of friction holds objects in place.
What is static friction?
A car travels for 2 hours and goes 80 miles. The speed of the car is this.
What is 40 miles per hour?
Name two of the four things a force can do to an object.
What is move, stop, change direction, or change speed?
A feather and a bowling ball are dropped on the moon. This is what happens and why
What is hit the ground at the same time because there is no gravity?