1.01, 1.11-1.14, 1.17, 1.21, 4.03, 4.11, 4.12, 4.16, 4.17 Work, Power and Acceleration

Work done meaning

Transfer of energy (only when you cause movement)

Work done, force, distance formula

Work done= force x distance moved (in direction of force)

Power, work done, time equation

Power = work done/ time

Power meaning

The rate of transfer of energy (or doing work)

Force, mass, acceleration equation

Force = mass x acceleration

Newtons 2nd law

The force applied and the acceleration are directly proportional

Describe how terminal velocity occurs

• at the point of release the only force acting on the object is weight

• This unbalanced force causes acceleration

• As acceleration and speed increases, drag increases

• Eventually the drag force is equal to weight and the forces are balanced

• This causes the object to travel at a constant speed called terminal velocity