Force
Friction
Gravity
Types of Friction
Weight and Mass
100
This is a push or a pull.
What is force?
100
The force that two surfaces exert on each other when they rub against each other.
What is friction
100
Because this thing's mass is so great, it exerts a large gravitational force on the planets.
What is the sun?
100
This friction occurs when one object rolls across a surface of another object.
What is rolling friction.
100
This is a measure of the amount of matter in an object measured in grams on a balance.
What is mass?
200
Two forces acting in the same direction can do this together to produce a larger net force than either original force.
What is add together?
200
Friction acts in what direction to motion?
What is the opposite direction.
200
This pulls every thing toward the Earth's surface at a rate of 9.8 meters per second per second.
What is gravity?
200
This friction occurs when two solid surfaces slide over each other while touching.
What is sliding friction.
200
This is a measure of the gravitational force (On Earth 9.8 M/s/s) exerted on an object because of it's mass.
What is weight?
300
Two forces acting in opposite directions can do this to produce a net force in the direction of the larger force.
What is subtract?
300
This type of surface produces less friction.
What is a smooth surface.
300
This person realized that gravity acts everywhere in the universe, not just on Earth.
Who is Newton?
300
This friction occurs when a solid object moves through a fluid like water, air, or oil.
What is fluid friction.
300
Weight varies with the strength of the gravitational force but this does not.
What is mass?
400
Force depends on these two things.
What is its strength and direction?
400
the major byproduct of friction
What is thermal energy (heat).
400
These two factors affect the gravitational attraction between objects.
What is mass and direction?
400
This friction that acts on objects that are not moving.
What is static friction.
400
Your weight would be this on the moon than your weight on Earth.
What is less?
500
Two equal forces that act in opposite directions do this to each other.
What is cancel each other out?
500
These are the four types of friction.
What is static friction, rolling friction, sliding friction, and fluid friction.
500
For a spacecraft traveling toward Mars, Earth's gravitational pull does this as the spacecraft's distance from Earth increases.
What is decreases?
500
To reduce friction, objects are built like this.
What is streamlined.
500
One small lemon is equivalent to this weight?
What is one newton?
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