Types of Forces
What is a force?
Push or Pull
Two forces equal in strength and opposite in direction
Balanced forces
Describe the difference between speed and velocity
Speed = how fast an object moves & Velocity = speed with direction
This law is also known as the Law of Inertia
Newton's 1st law
How can you model forces?
Arrows to show strength and direction
These types of forces will cause an object's motion to change.
Unbalanced forces
What is the average speed of a rocket that travels 230 km in 3.5 hours?
65.7 km/h
Which law states that if one object exerts a force on another object, that object exerts an equal force on the first object in the opposite direction.
Newton's 3rd law
Occur when two objects are in direct contact with each other
Contact force
A net force of zero means the forces are _____ and the object's motion _____ change.
Balanced, will not
What distance is traveled by a police car that moves at a constant speed of 1.5 km per minute for 5 minutes?
7.5 km
What is an object's resistance to change?
Inertia
Name the 3 common types of Friction
Sliding, Fluid, and Rolling friction.
A force of 32 N is applied to a box on one side, and a force of 34 N is applied on the opposite side in a different direction. What is the net force?
2 N
Billy goes into an 8 story building and starts on the 2nd floor. He takes the elevator up 4 floors, down 2 floors, down 1 floor, up 5 floors, and down 1 floor. What floor does Billy end on? What is his displacement?
7th floor, displacement = 5 floors.
A stationary chair exerts a force onto the floor, the floor exerts a force back onto the chair that is equal in magnitude but opposite in direction. This is an example of what?
Force pair
What is a Normal Force?
A force applied perpendicularly to a surface.
You and a friend push a car from the same direction with a force of 25 N and 35 N. What is the net force? Are the forces balanced or unbalanced?
60 N, Unbalanced
Sarah runs a race. If she ran at a constant speed of 1.5 meters in 10 minutes. What is the total distance she traveled?
15 meters
______ forces can move an object or change the motion of an object already in motion.
Unbalanced