scalar quantity - A quantity that has a magnitude (size) but not a direction. Examples include mass, distance, energy and speed., vector quantity - A quantity that has both a size and a direction. Examples include force, velocity, displacement, momentum and acceleration., magnitude - The size of something, such as the size of a force or the measurement of a distance. It can be measured on a scale., distance - How far something has travelled. Distance is a scalar and has no direction., displacement - The distance travelled in a particular direction. Displacement is a vector, distance is not., speed - A measure of the distance an object travels in a given time. Usually measured in metres per second (m/s). It is a scalar quantity., velocity - The speed of an object in a particular direction. Usually measured in metres per second (m/s). Velocity is a vector, speed is not., average speed - The speed worked out from the total distance travelled divided by the total time taken for a journey. speed = distance travelled /time, instantaneous speed - The speed at one particular moment in a journey., distance/time graph - A graph of the distance travelled against time for a moving object. The gradient of a line on a distance/time graph gives the speed., velocity/time graph - A graph of velocity against time for a moving object. The gradient of the graph gives acceleration and the area under gives the distance travelled., gradient - A way of describing the steepness of a line on a graph. It is calculated by taking the change in y divided by the change in x., acceleration - A measure of how quickly the velocity of something is changing. It can be positive if the object is speeding up or negative if it is slowing down.,

Motion

Cetak
Menyematkan

Papan Peringkat

Gaya visual

Pilihan

Berganti templat

Pulihkan simpan otomatis: ?