Vocabulary
What is force?
A push or pull exerted on an object
This is a force of attraction between objects due to their mass.
Gravity
What is net force?
Combination of all the forces acting on an object
A school bus travels 12 miles from the first pick-up stop to the school. The trip takes 0.5 hours (30 minutes). What is the average speed of the bus in miles per hour?
24 mph
Nora is pulling a wagon 35 N east, and Jane is also pulling the wagon 40 N west. What is the total net force on the wagon?
5N West
This is a change in an object’s position over time.
motion
This is a force that resists motion between a moving object and the air around it.
Air resistance
What is a reference point?
A stationary point to indicate if an object is in motion.
A sprinter runs a 200-meter race in 25 seconds. What is the runner's average speed in meters per second?
8 m/s
37 N Right
A change in an object’s position over time.
What is air resistance?
The friction between an object and air
What is used to show all of the forces acting on an object?
Force Diagram
A family drives on the highway for a total distance of 180 miles to visit a state park. It takes them 3 hours to get there without stopping. What was their average driving speed?
60 mph
Jade, Miley, Carol, and Lily are playing with a giant quilt on the field. Jade is pulling 10 N right, Miley is pulling 20 N up, Carol is pulling 10 N Left, and Lily is pulling 10 N down. What is the total netforce on the quilt?
10 N up
The rate at which velocity changes is called
acceleration
Arrows
The further something is away from earths center, does the force of gravity increase or decrease?
Decrease
A pet turtle crawls across a patio, covering a distance of 12 meters in 4 minutes. What is the turtle's average speed in meters per minute?
3 m/min
A box has two forces acting on it. One force is 100 N upward. Another force is 50 N downward. What is the net force on the box?
50 N Upward
A force that can act at a distance is called
A noncontact force.
These forces require touch
Contanct Forces
What force stopped the skydiver from falling so quickly during the lesson phenomenon?
Air resistance
Liam rides his skateboard down a smooth hill. He travels 150 meters in 30 seconds. What is his speed in meters per second?
5 m/s
Mr. Smith and his wife were trying to move their new chair. Mr smith pulls with a force of 30 N while Mrs. Smith pushes with a force of 25 N in the same direction. What is the net force?
55 N Same Direction
55 N Mr. Smiths Direction