Physics 2 Unit 1 Unit 2

Speed = distance➗time

Velocity is speed in a give direction

a = ( v - u ) ➗t

• a = acceleration
• v = final velocity
• u = initial velocity
• t = time

The distance traveled in a given time

Newtons

• Gravity
• Reaction (Upthrust)
• During force (thrust)
• Air resistance
• Water resistance

• This is a single force that had the same effect as all forces acting on an object
• E.g. Relation - gravity = RF

• There will be an acceleration in the direction of the force.
• E.g. During force (1000N) - Air resistance (600N) = Resultant force (400N)

F = m x a

This is the distance traveled during the drivers thinking distance + braking distance

• Tiredness
• Alcohol
• Drugs

• Poor roads
• Bad weather
• Poor conditions of the car

This is when the object moves at a steady speed

Weight = Mass x Gravity

An elastic object is one that regains its original shape after force is removed

Energy stored in an elastic potential energy when work is done to change its shape

The extension of an elastic object is directly proportional to the force applied, providing the limit of proportionality is not exceeded

This is the limit in which the object can withstand force

F = k x e

• F = Force applied
• k = spring constant
• e = extension