Newton's laws
Gravity
Force
Simple Machines
vocabulary
100
Describe an object in motion tends to stay in motion, an object at rest stays at rest unless acted upon by an outside force
What is Newton's First Law
100
How does the mass of an object affect the pull of gravity?
What is more mass = more gravity
100
hammer claw, crowbar,
What is lever?
100
a property of matter that causes objects to resist a change in motion
What is inertia
200
Force = Mass x Acceleration
What is Newton's Second Law
200
more distance = less gravity
How does the distance affect the pull of gravity?
200
tradeoff with simple machines
What is use less force over a longer distance
200
doorknob, steering wheel, car wheel, can opener chain saw
What is wheel and axle
200
The force used to move something over a distance
What is work?
300
Newton's Second Law example
What is larger masst requires more energy to move it
300
Anything with mass has gravity
What is Law of Universal Gravitation
300
knife, nail, door stopper, crowbar, billow, scissors
What is wedge?
400
A change in speed or direction
What is acceleration?
400
more surface area
What is the reason a boat floats easier than a penny
400
bolt,
What is a screw?
400
The resistance to movement that happens when two surfaces are moving over each other.
What is friction?
500
For every action there is an equal and opposite reaction
What is Newton's Third Law
500
Pushes up against gravity causing weight to decrease
What is buoyancy?
500
cranes, clothesline
What is pulley
500
how well a machine uses effort (energy) to do a job
What is efficiency
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