Forces
What is a force?
A push, pull or twist of an object.
What type of force does a magnet have?
Non-contact forces: attract or repel, even from a distance
What type of energy do objects in motion have?
kinetic energy
Which simple machine does a flagpole use in order to fly the flag?
Pulley
How do we calculate Force.
Force equals mass times acceleration
what stone is naturally magnetic
Lodestone
What is energy?
The ability to do work
Define simple machines (100 points for each main concept)
Simple machines are machines with few or no moving parts that are used to make work easier
What is Newton's first law?
An object at rest stays at rest and an object in motion stays in motion, unless an unbalanced force acts on it.
which principle explains that as air moves around an object, it creates different pressures on that object.
Bernoulli’s Principle
What is STORED energy or Energy that is NOT being used called?
Potential energy
Which simple machine is a nail an example of?
wedge
Newton's second law
Force = mass x acceleration aka F=ma
Name the 4 Contact forces (100 points for each one)
applied force
spring force
drag force
frictional force
What do we call a force that opposes motion (like a rough surface)
friction
Which simple machine makes lifting weight easier by using a fulcrum to redirect force?
Lever
Newton's third law
For every action, there is an equal and opposite reaction.
How do you calculate work?
Work is calculated as the force times the distance. (W=FtimesD)
What do we call the tendency of a body to resist a change in motion or rest.
Inertia
Name all 6 simple machines
Wedge
Wheel and Axle
Lever
Inclined Plane
Screw
Pulley