What is a force?
What is gravity?
What is friction?
What is air resistance?
100
A push or pull
A force
100
Scientist who is famous for studying this force.
Sir Isaac Newton
100
Force that opposes the motion of an object.
Friction
100
Force that opposes gravity in a falling object.
Air resistance
200
Type of forces that cause change in motion of object.
Unbalanced
200
Force of attraction between all objects in the universe.
Gravity
200
Type of friction that involves wheels
Rolling
200
Speed at which air resistance and gravity are equal and falling object is no longer accelerating toward Earth.
Terminal velocity
300
Natural force that produces electricity at the Hoover Dam.
Water
300
Gravity is a function of the ___________________ and distance between two objects.
Masses
300
Type of friction involved when I move one of the tables to the back of the room to play Jeopardy.
Sliding
300
Lack of gases or atmosphere; like "outer" space
Vacuum
400
The strength and direction of a force is represented by this.
An arrow
400
Highest level of G forces a human can withstand.
9 Gs
400
Type of friction also known as air resistance
Fluid
400
Why did some of you use parachutes in the egg lab?
To provide more air resistance
500
A force that changes from planet to planet.
Your weight.
500
To decrease the gravity between two objects you should _____________ their masses or __________________ the distance between them.
decrease, increase
500
Used in your car to reduce the friction of moving parts of the engine
Oil (lubricant)
500
Why does a flat piece of paper "float" down to the ground while a crumbled up piece falls quickly?
The larger surface area of the flat piece provides more area for air resistance to counter the effects of gravity.
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