Contact and non-contact forces

What is a force

a push or pull that acts on an object due to it interacting with another object

What is force measured in

Newtons

What are contact forces

objects are physically touching

What are non contact forces

don't require the objects to be touching

What are examples of contact forces

air resistance, friction, tension, reaction force

What is a reaction force

a force that is equal and opposite to the original force

What are examples of non contact forces

gravitational force, electrostatic force and magnetic force

Is force a vector quantity or scalar

vector

What happens to the strength of non contact forces as they get further apart

It decreases

Explain why air resistance is a contact force

there is a physical contact between an object and air particles