PHYSICS - Contact and Non-Contact forces

what does vector quantity have

magnitude and direction

what does scalar quantity have

ONLY magnitude and NOT direction

give three examples of things with vector quantity

force, velocity, acceleration

give three examples of things with scalar quantity

speed, distance, temperature

what are vectors represented by

an arrow

what does the length of the arrow show

the magnitude

what does the direction of the arrow show

the direction of the quantity

what do two objects with different velocities show

that they are travelling in different directions

what is a force

a push or pull on an object that is caused by it interacting with something

what are all forces measured in

Newtons (N)

what is a contact force

a force that acts when two objects touch

give three examples of contact forces

friction, air resistance, tension in ropes

what is a non-contact force

a force that can act without objects touching

give three examples of a non-contact force

magnetic force, gravitational force, electrostatic force

what happens when two objects interact

there is a force produced on both objects

what is an interaction pair

a pair of forces that are equal and opposite and act on two interacting objects