S8 - Segment 1 The Speed of Objects and Waves

scientific law

• a set of verbal or mathematical rules to describe a natural phenomenon; unlike scientific theories, scientific laws do not explain the phenomenon

• a hypothesis that has been tested multiple times and is widely accepted

• a detailed explanation of a natural phenomenon based on extensive evidence

• a collection of observations that have not been tested scientifically

position

• the distance and direction that an object is from a reference point

• the speed of an object in motion

• the mass of an object in relation to gravity

• the time taken for an object to travel a distance

Newton's second law of motion

• states that an object's acceleration is equal to the net force on the object divided by its mass

• states that for every action, there is an equal and opposite reaction

• states that an object in motion stays in motion unless acted upon by an external force

• states that the force acting on an object is equal to its mass times its velocity

rate

• an amount of something measured per unit of something else; many rates describe changes or events that happen over time

• a fixed amount of money paid for a service or product

• the speed at which something happens or is done

• a measure of the frequency of an event occurring in a given time period

force

• a push or a pull on an object

• a type of energy

• the speed of an object

• the mass of an object

speed

• the rate that describes how far an object moves over time

• the measure of how quickly an object can stop

• the distance covered by an object in a straight line

• the time taken for an object to complete a journey

model

• a representation of a situation which makes important aspects easy to see

• a detailed description of a process

• a complex system that is difficult to understand

• a theoretical framework without practical application

transverse wave

• a wave in which the matter moves in a pattern parallel to the direction that the wave travels

• a wave in which the matter moves in a circular pattern

• a wave in which the matter moves in a pattern perpendicular to the direction that the wave travels

• a wave that does not require a medium to travel

newton

• a unit used to measure the strength of a force

• a type of energy

• a measure of temperature

• a unit of mass

unbalanced forces

• forces that have a net force not equal to 0 N

• forces that are equal in size and opposite in direction

• forces that cancel each other out

• forces that act on an object at rest