Scalar and vector quantities, resolving vectors + scale drawings and resultant forces

What are scalar quantities?

quantities with only magnitude, no direction

give examples of scalar quantities

Speed

Distance

Mass

Temperature

Time

What are vector quantities?

quantities which have a direction and magnitude

Give examples of vector quantities

force, velocity, displacement, acceleration, momentum

how are the main two forces in a resolving vectors scale drawing arranged

they are always arranged tip to tail

what happens if the forces all balance in a resolving vectors scale drawing

it forms a perfect triangle so there's 0 resultant force

What is a resultant force?

the overall force acting on an object

when there is no resultant force we say that the object is in ______

equilibrium

on a vector quantity the length of the arrow represents _______ and the direction of the arrow represents the ________ of the vector quantity

magnitude

direction

explain circular motion and why its veocity changes even though its speed is the same

Velocity is a vector quantity, and the velocity of an object is its speed in a given direction

When an object travels along a circular path, its velocity is always changing

The speed of the object moving in a circle might be constant - that is, it is travelling the same distance every second

However, the direction of travel is always changing as the object moves along the circular path

when is a vector quantity value negative

when the resultant force acts in the opposite direction to the object's motion.