Sir Isaac Newton
An object at rest stays at rest unless acted upon by a force.
What is the First Law of Motion?
a push or pull on an object
this simple machine consisting of a flat surface with one end higher than the other
What is an inclined plane?
motion at a constant speed in a straight line
what is uniform motion?
a force that acts at a distance
what is non-contact force?
an object in motion stays in motion with the same speed and in the same direction unless acted upon by a force
What is the First Law of Motion?
the force of attraction between two objects
What is gravity?
this simple machine that consists of a rope that fits into a groove in a wheel
what is a pulley?
this simple machine that consists of a bar that moves around a fixed point called a fulcrum
What is a lever?
a force that requires two pieces of matter to touch
What is contact force?
Force = mass x acceleration
What is the Second Law of Motion?
The force that results when two materials rub against each other
What is friction?
this simple machine made of one or two inclined planes
What is a wedge?
it reduces friction making them to move faster
What is how shapes of boats and planes help them move faster?
examples include friction, air resistance, tension, and water resistance
What are contact forces?
describes how force, mass, and acceleration are related
What is the Second Law of Motion?
the rate at which the speed or direction of motion of an object changes over time.
What is acceleration?
this simple machine consisting of a circular object attached to a bar
what is a wheel and axle?
these are the factors that are related to the force needed to move an object up an inclined plane
What are steepness of the plane and weight of the object?
examples include gravity, electric forces, and magnetic forces
what is non-contact forces?
For every action force there is an equal and opposite reaction force
What is the Third Law of Motion?
the tendency of an object to resist any change in motion
What is inertia?
simple machine consisting of a smooth cylinder with a tiny inclined plane wrapped around it
What is a screw?
this is where the fulcrum should be placed to make it easier on the person.
**EXPLAIN WHY
What is farthest away from the person? (closest to the load)
**The closer the fulcrum is placed to the object, there is less input force needed by a person to to lift the load. This placement makes it easier to lift.
these types of surfaces results in more friction, causing an object to slow down faster
what is rough or bumpy