Physics

Notes and Booklet

What is a scalar quantity?

no direction just size.



distance is a scalar quantity.

what is a vector quantity?

Size and direction.

Displacement is a vector quantity.

DEPTH formula

s x t /2

distance

total measurement covered
measured in km/m/ ect so it is a scalar quantity

displacement

how far it is from the start

measured in size and direction (vector quantity)

What is speed?

A measure of how quickly something moves.
no direction so it is a scalar quantity.

formula= d/t

What is velocity?

A measure of how much displacement changes with time.
Vector quantity so it has size and direction

formula= displacement final - displacement initial over time

speed and velocity conversions

What is Sonar?

Sound Navigation and Ranging

What is acceleration?

The rate of change in velocity
Unless an object has a constant velocity, it is accelerating.
Vector Quantity- size and direction.

formula= v f - v i / t

Motion graphs

displacement time graph area under= total distance

slope= velocity/speed.

Velocity graphs

area of 1 2 3 under= area pythag and the gradient is the acceleration.

Vector scales

A+B= pythag always start with a

A-B reverse it si a stays same but make be the oposite direction eg b=11 km East b is now 11 km West then calculate pythag think like -B only applies

Comparing graphs