Newton’s Laws of Motion. First Law If there is no resultant force (overall force) on an object, it does not accelerate –it continues to move with constant.

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Presentation transcript:

Newton’s Laws of Motion

First Law If there is no resultant force (overall force) on an object, it does not accelerate –it continues to move with constant speed –in one fixed direction –The speed could be zero – i.e. it stays still

Second Law If there is a resultant force (overall force) on an object, it does accelerate in the direction of the force –Acceleration proportional to force –More mass, smaller acceleration –Rate of Change in momentum = force OR –Force = change in momentum ÷ time

Third Law Forces come in pairs. If A exerts a force on B then B exerts a force on A –Forces are same size –In opposite direction –On different objects (A on B, B on A)

Complete the sentences. Choose the best words from this list. counter driving upthrust tension velocity work Bradley supplies the force for the bike. Air resistance supplies the force. For the speed to increase, the force must be greater than the force. Bradley Wiggins is a leading British cyclist. This question is about the forces on his bike.