forces that cancel each other out when acting together on a single object
forces that do not cancel each other out when acting together on a single object
the force one object applies to a second. (Newton's 3rd law)
the force with which an object responds to an action (Newton's 3rd law)
the use of force to move an object a certain distance
a machine with few moving parts, making it easier to work
a simple machine made of a rigid bar a fixed point called a pivot point (or fulcrum)
the pivot point of a lever
the part of the lever that applies force to the resistance arm
the part of the lever that applies force to the load the machine acts against
Newton's second Law of Motion
when an unbalanced force acts on an object, the objects acceleration equals the force divided by the objects mass. (action= force/mass)
Newton's third Law of Motion
For every action the is a equal but opposite reaction .
Example of Newton's 1st Law
a football will sit still on a level field until a kicker kicks it.
a ball will roll down a hill until the angle of the hill changes direction
Example of Newton's 2nd law
when you use your arm to throw a football, the football excellerates through the air if the force of the throw is stronger than the mass and the air pushing against the ball.
Example of Newton's 3rd law
Car moving forward: tires push on the road and the road pushes back - the reaction force propels the car forward.
Two examples of inertia
When you are in a car moving forward and slam on the brakes, your body will move forward. If you go around a corner in a car really fast - your body will lean the opposite direction of the turn.
Name 6 simple machines
wheel & axle