P2.2 Newtons Laws

• Newtons first law is An object at rest remains at rest, and an object in motion remains in motion at constant speed unless acted on by a force
• Newton's second law is f=ma
• The first law is also known as the law of inertia.
• Newton's third law is every action has an equal and opposite reaction
• Scalar quantities have only magnitude
• Vector quantities have both magnitude and direction
• The equation for momentum is, momentum = mass x velocity
• the work done equation is work done = force x distance
• power = work done / time taken
• speed = distance / time
• average speed = total distance traveled / total time taken
• acceleration = change in velocity / time
• (final velocity)2 - (initial velocity)2 = 2 × acceleration × distance
• The displacement can be found by calculating the total area of the shaded sections below the line.