Physical Science: Chapter 3 - Motion and Forces

SI unit of power

Diagram that shows how a force is acting on an object

W=fd

Velocity at which the magnitude of drag equals an object's weight

A push or a pull

Law of motion - law that relates force and acceleration

Law of motion - action/reaction

simple machine - like an inclined plane that modifies the applied force and directs it to the sides

A vector quantity representing an object's change in position

Vector showing the combined effect of two or more other vectors

classified by the arrangement of the input arm, output arm, and fulcrum

simple machine - wheel over which a rope or cable passes

p=mv

Italian scientist who viewed the universe as a special creation of God

Branch of physics that addresses the effects of forces on matter

device is considered a circular lever and can be used to multiply distance

The study of matter and energy and the interactions occurring between them

c² = a² + b²

Law of motion - f=ma

Simple machines can...

Mathematical quantity that has only a magnitude

measure of how well a machine converts input work to output work

Physics developed since 1900

combination of one or more fixed pulleys and one or more movable pulleys

Law of motion - aka law of inertia

Branch of physics developed before 1900

A scalar quantity representing the total length of the object's path

transfer of energy from one object to another by a force

term for devices used to multiply force for the purpose of doing work

Speed of an object traveling 40 miles in 2 hours

simple machine - sloping surface that allows an object to be raised without being lifted straight up

an object that hangs from a fixed point and swings back and forth because of gravity

Mathematical principle stating the square of the hypotenuse of a right triangle is equal to the sum of the legs squared

Space relative to which motion is measured

The Greek letter that represents the change in a value

the friction between two surfaces is described by a unitless value called ___

SI unit of power

type of friction that affects the sliding of an object already in motion

The reaction force to the centripetal force - center fleeing

His teachings dominated science for almost 2000 years

SI unit of work

Combination of two different vectors into a resultant

SI unit of force and weight

transfer of energy from one object to another by a force

The force that causes an object in circular motion to travel in a curved path - central seeking

quantity of motion defined as the product of an object's mass and velocity

Any change in velocity

The study of motion and forces

type of friction affects stationary objects, preventing them from moving

rate of doing work

output distance of a screw

Distance per unit of time

gravitational force exerted on an object near the surface of the earth or any celestial body

A state of change in position

type of friction affects a sliding object already in motion

force that causes objects to travel in a curved path rather than a straight line

Scientist responsible for discovering laws of motion

Mathematical quantity that has magnitude and direction

Law of motion - object in motion will stay in motion/object at rest will stay at rest unless acted upon by outside force

The resultant of adding the individual forces on an object through vector addition