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100
This is an object that appears to stay in place.
What is a reference point?
100
This is a combined force that does not cause an object to move.
What is a balance force?
100
This is what changes when gravitational force changes.
What is weight?
100
This is a force that opposes motion between two surfaces.
What is friction?
200
This is when an object changes position over time.
What is motion?
200
This is the force that holds objects to the Earth's surface.
What is gravity?
200
This will change if you travel to a different planet.
What is weight?
200
This surface texture causes greater friction.
What is rough?
300
These are the two things speed depends on.
What are distance and time?
300
This is a combined force that causes something to move.
What is an unbalanced force?
300
This will not change if you travel to a different planet.
What is mass?
300
This is a change in velocity.
What is acceleration?
400
This is the SI unit for speed.
What is m/s?
400
This is the combination of all forces acting on an object.
What is net force?
400
This is the SI unit for force.
What is a newton?
400
This is an increasing velocity.
What is positive acceleration?
500
Waxing skis before skiing helps reduce this.
What is friction?
500
This is the amount of matter in an object.
What is mass?
500
This is a push or pull that can cause a change in motion.
What is a force?
500
This is the SI unit for mass.
What is a kilogram?
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