Lesson 1
This category of force happens when two objects touch each other
Contact Force
A student walks from one side of the classroom to the other. What must happen for this to be considered motion?
The student's position must change
Forces are best described as these two actions.
Pushes and Pulls
This force pushes up on an object resting on a surface.
Normal Force
This Force pulls objects towards each other and depends on mass and distance
Gravity
Two students are sitting on a moving train. They say they are not moving. Who would disagree with them?
Someone outside the train
When forces are equal and opposite, this happens to motion.
No change in motion
This term describes how fast something moves in a specific direction.
Velocity
This force resists motion between two surfaces that are touching.
Friction
A car is driving in a perfect circle at constant speed. What is constantly changing?
Direction
This is the total of all forces acting on an object.
Net Force
A car speeds up after a traffic light turns green. What is happening to the car?
Acceleration
Name one factor that increases friction between two surfaces.
Rough surface or More pressure
A student walks around a 100m square and ends where they started. What is their displacement?
Displacement = 0
When net force is not zero, this happens to an object.
Acceleration
This property makes objects resist changes in motion.
Inertia
This type of friction keeps an object from moving until enough force is applied.
Static friction
A runner finishes a race faster than another runner, but ran the same distance. What is different between them?
speed
According to Newton, every action has this type of force.
An equal and opposite reaction.
If the distance increases but time stays the same, what happens to speed?
Speed Increases