Motion

Motion Motion is the process of moving or changing places or position Anything you do while moving is motion. Fact: Speed is a major type of Motion

Determining motion In order to determine motion you must know direction and speed To describe motion accurately and completely, a Frame of Refrence* is necessary You can’t determine motion without a type of force The object’s motion doesn’t change if there is no force acted upon it * A system of objects that are not moving with respect to one another

Force Force* is a major part in motion. Without force motion wouldn’t exist. Force can speed you up or slow you down Examples of force: Wind Gravitational Force Electrical Force Normal Force * Strength or energy as an attribute of physical action or movement Fact: Electric force and magnetic force are the only forces that can both attract and repel

Speed Speed* falls in multiple categories/subsections such as: Acceleration Velocity Average Speed Instantaneous Speed * The ratio of the distances an object moves to the amount of time the object moves

Acceleration Non-Constant Acceleration Constant Acceleration Acceleration is equal to net force/mass Acceleration is (A=Vf-Vi/T) the rate at which velocity changes Non-Constant Acceleration Describes the situation in which the speed of an object is increasing, but isn’t always the result of changes in speed Constant Acceleration

Velocity The speed and direction in which an object is moving Sometimes the motion of an object involves more than one velocity. The change in velocity can be the result of a change in speed, a change in direction or both Acceleration and Velocity are both vector quantities The velocity of an object moving in a straight line changes at a constant rate.

Average and instantaneous speed The total distance* travelled Computed for the entire duration of a trip, and instantaneous speed is measured at a particular instant The rate at which an object is moving at a given time Example is the speedometer *Distance- the length of the path between two points *Displacement- the direction from the starting point and the length of a straight line from the starting point to the ending point

Net force & momentum Net Force Momentum Net force is the overall force acting on an object If an object hits another object they produce the same net force the quantity of motion of a moving body, measured as a product of its mass and velocity An object has a large momentum if the product of its mass and velocity is large The loss of momentum in an object becomes a gaining in momentum in another object