A building or a tree is an example of this, an object that appears to stay in place over time
What is a reference point?
100
The higher the newtons the greater the this.
What is force?
100
Force that opposes motion between two surfaces that are touching
What is friction?
100
This is a result of mass
What is gravity?
100
Total Distance
_______________
Total Time
What is average speed?
200
When an object changes position over time when compared with a reference point, the object is this.
What is in motion?
200
A force that results from combining all forces exerted on a object. For example: 25 N + 20 N = 45 N to the right
What is net force
200
The amount of friction between 2 surfaces depends on this
What is force and roughness of surface?
200
This is the amount of matter in an object and the value will not change, even if you go to the moon!
What is mass?
200
Final Velocity - Starting velocity
____________________________
Time it takes to change velocity
What is acceleration?
300
The rate at which something moves
What is speed?
300
This is necessary to cause a nonmoving object to start moving; produces a change in motion or acceleration
What is unbalanced forces?
300
Four types of friction
What is sliding, rolling, fluid and static?
300
This is the measure of the gravitational force on an object, it will change if you leave Earth.
What is weight?
300
Velocity must include this
What is direction?
400
Speed of an object in a particular direction-subject to change if direction or speed changes
What is velocity?
400
This does not cause a change in the motion of a moving object nor does it cause a nonmoving object to start moving. A bird nest in a tree is an example of this
What is a balanced force?
400
Motor oil, wax and grease are examples of this and will reduce friction
What are lubricants?
400
This increases when mass increases or when distance decreases. However, this decreases when distance increases and mass decreases.
What is the gravitational force?
400
Adding two velocities that are in the same direction will give you this. When velocities are in the opposite direction, you can find this by subtracting the smaller velocity from the larger velocity.
What is resultant velocity?
500
This is how much velocity changes as well as how fast velocity changes.
What is acceleration?
500
Two groups of students are having a tug-of-war. The team on the left pulls with a force of 221 N and the team on the right pulls with a force of 228 N. How do you determine who will the war?
What is subtract 221 N from 228 N for a net force of of 7 N and the team on the right will win?
500
Putting sand down on an icy road or a baseball player putting on a batting glove is an example of this
What is increasing friction?
500
Sir Isaac Newton answered questions to arrive at this and it describes the relationship between the gravitational force, mass and distance. It applies to all objects.
What is The Law of Universal Gravitation?
500
A plane taking off from the airport, a car starting after stopping for a traffic light, or a runner beginning a race are all examples of this change in velocity.