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100
What is a Force?
a push or pull that makes object change direction, speed up, slow down
100
To do work you need to use your _______
energy
100
What does friction result in?
heat energy!
100
Kinetic energy is energy of ________ while potential is energy of _________
motion, position
100
What is the definition of energy?
ability to do work
200
What is the force that makes something slow down?
Friction
200
What is the definition of gravity?
the attraction between 2 things because of their mass, when Earth pulls object to center of Earth
200
Give an example of work being done
anything in motion
200
An object that keeps doing what it does is said to have
inertia
200
What are 2 examples of simple machines?
inclined plane & Wedge
300
What is needed to apply force to object?
energy
300
What is weight?
Mass + Gravity
300
What is super unique about energy?
it can change forms
300
What do you need to overcome to make something go in motion, or stay at rest?
inertia
300
What machine is scissors considered why?
a compound machine, made of 3 parts: small screws, blades, handles
400
You are pushing a book across the table, whats the force?
hand pushing
400
Who is the name of the Scientist we talked about this chapter, who talked about forces?
Newton
400
What are the 2 types of energy, give examples
potential, and kinetic--> person on top of slide, sliding down
400
If something doesn't go in motion.....
NO WORK HAS BEEN DONE
400
Explain the types of energy that are present when a person swings back and forth (come up in front of class and use your hands to explain)
potential at top, kinetic when it moves
500
What were the 2 things that Newton said?
1) object stays at rest until force pushes on it 2) object keeps moving until force stops it
500
Because friction results in heat energy, what do you think would happen when 2 things rub against each other so much?
fire!!!!!
500
Why does ball on fridge have HIGHER potential Energy than if it were on chair?
it has more energy to fall down a longer height
500
Difference between simple, compound, complex machines?
simple- 1, 2 parts compound- 2 or more parts complez- 1 or more simple machines
500
To do work, you use ________ by putting a __________ on an object. If it goes in motion, _______ has been done. When it starts to slow down you know that is because of _______________. If something stops it, you know that’s because of another ____________ that acted upon it.
Energy force work friction force
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