Motion and Forces

what are forces and motion?

they explain how pushes and pulls change speed , shape or direction of an object

types of forces?

contact , non contact and weight vs mass

contact forces?

physical touch life friction air resistance and tension

non contact forces?

act over a distance without touching like gravity, magnetism, electrostatic forces

weight vs mass

weight is a force measured in newtons caused by gravity pulling on an objects mass, while mass is measured in kilograms

Newtons Laws of Motion

first law, second law, third law

Newtons First law?

an object stays at rest or moves ar a constant speed unless an unbalanced resultant force acts on it

Newtons Second Law

force = mass x acceleration . a larger force causes a faster change in speed

Newton’s third law

for every action there is an equal and opposite reaction

Scalar quantities

have size/magnitude only , like speed and distance

vector quantities

have both size and direction , like velocity and displacement

acceleration

the rate at which velocity changes overtime