Year 10 Physics

distance

The length of a path between two points. Unit = meters

displacement

the straight line distance between two points, includes direction (north-south-east-west) Unit = meters + direction

Speed

The distance an object travels per unit of time (distance/time). Unit = m/s

Velocity

the speed of an object in a particular direction (displacement/time) Unit = m/s + direction

km/hour to m/s

divide by 3.6

distance-time graph gradient

speed

Speed-time graph gradient

acceleration

Speed-time graph area under graph

distance travelled

Acceleration

The rate at which speed changes. a = (v-u)/t. Unit = m/s2

Newton's 1st Law

(Law of Inertia) an object in motion tends to stay in motion & an object at rest stays at rest unless acted upon by an unbalanced force.

Newton's 2nd Law

Force (N) = Mass (kg) x Acceleration (m/s2)

Newton's 3rd Law

For every action force there is an equal and opposite reaction force

Kinetic energy

he energy an object has due to its motion. KE=1/2mv^2

gravitational potential energy

Potential energy that depends on the height of an object. GPE = m g h

Work done

Work done (J) = Force(N) x distance(m)

Power

Power (J/s) = Work done (J) / time (s)