Vocabulary
This pulls objects to its center of the Earth. It keeps you grounded.
Gravity
When you're riding on a bicycle, what is friction force you feel known as?
What is the speed formula?
Speed = Distance / Time
The tendency of an object to resist a change in motion
Inertia
The amount of matter in an object
Mass
This is a force between two surfaces rubbing against each other. It works against the motion of an object.
Friction
Mike lifted a heavy box. What force did he have to overcome to move the box upward?
Gravity
Why does a parachute makes a person falling from a great height fall more slowly?
The parachute causes air resistance or drag, which slows the fall.
Two cars are traveling down a road. The blue car travels 120 meters in 20 seconds. The red car travels 300 meters in 40 seconds. Which car has the faster speed?
Red car is faster
(Blue: 120/20= 6 m/s)
(Red: 300/40= 7.5 m/s)
Force
The type of force which results in movement?
An unbalanced force.
Which would be easier to stop if they were traveling in the same direction and in the same speed, a soccer ball or a bowling ball?
Soccer ball
If a truck traveled 24 miles in 6 minutes, what was the speed of the truck? (don't forget units!)
4 Mi/Min
(24 miles / 6 mins = 4 Miles per Minute)
A group of objects that you use to measure position & motion
Frame of reference
A change in velocity.
(Can be slowing down, speeding up, or changing direction)
Acceleration
Mrs. Macko's class & Ms. Gumble's class are playing tug-of-war. After several minutes, the students notice that the rope has not moved at all. What is one possible cause of this?
The two classes are applying balanced forces on the rope
Which has more friction, an ice rink or a gravel road?
Gravel road
Max and Madison are moving a dresser, but are applying force in opposite directions. Max is pushing the dresser with a force of 5 newtons towards Madison. Madison is pushing the dresser towards Max with a force of 10 newtons. What happens to the dresser?
The dresser moves towards Max because Madison is applying more force
How fast an object changes position over time is known as
speed
Forces that do not cancel each other out and causes an object to change its motion
Unbalanced force
A sports car and a truck travel at the same speed on a road in the same direction. Both vehicles slow down with the same amount of force. Why does the truck need more distance than the car to stop?
The truck has more mass. (more mass = more momentum)
What are the two forces on Earth that oppose motion?
Friction and gravity.