formulas

• average speed = total distance covered/total time taken
• average velocity = total displacement/ total time taken
• rate of change of speed = final speed - initial speed/ time taken
• if rate of change of speed is constant, average speed = initial speed + final speed/ 2
• average velocity = displacement/ change in time
• average velocity = initial velocity + final velocity/ time taken
• acceleration = v-u/t
• if acceleration is constant, average velocity = initial velocity + final velocity/ 2
• force = mass x acceleration
• weight = mass x gravity
• extension = extended length - natural length
• force = spring constant x extension
• pressure = force/ area
• moment = force x perpendicular distance
• F1 x D1 = F2 x D2
• density = mass/ volume
• efficiency = useful energy input/ energy input
• work done = force x distance moved in direction of force
• power = work done/ time taken
• power = energy transferred/ time taken
• kinetic energy = 1/2 mass x velocity2
• GPE = work done in raising a load (m) against the force of gravity (g) through a height (h)