# Newton's Laws of Motion

• Created by: Lucy S
• Created on: 05-04-13 11:56
• Newton's Laws of Motion
• 2. The rate of change of momentum of a body is proportional to the force acting on it.
• The greater the mass (of the object being accelerated), the greater the amount of force needed (to accelerate the object).
• Force = mass x acceleration
• 3. For every action there is an equal and opposite reaction.
• For every force, there is a reaction force equal in size but opposite in direction.
• 1. Unless a resultant force acts on an object it will continue to move in a straight line at constant speed or remain at rest. ('Law of Inertia')
• For an object to speed up/slow down, a resultant force must act on it.
• For an object to change direction, a resultant force must act on it.
• If object is stationary, it will remain stationary, unless a resultant force acts on it.
• 1. Unless a resultant force acts on an object it will continue to move in a straight line at constant speed or remain at rest. ('Law of Inertia')
• For an object to speed up/slow down, a resultant force must act on it.
• For an object to change direction, a resultant force must act on it.
• If object is stationary, it will remain stationary, unless a resultant force acts on it.