# Year 10 Pathway C Mr. D. Patterson 1.  Describe forces as a push or a pull that can change an objects velocity or shape  State Newton’s First Law 

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Year 10 Pathway C Mr. D. Patterson 1

 Describe forces as a push or a pull that can change an objects velocity or shape  State Newton’s First Law  Describe the concept of inertia 2

 A force is a push or pull which may: ◦ A) Change the shape of an object ◦ B) Change the velocity of an object 3

 A force is a vector: it has magnitude and direction  The magnitude of the force is measured in Newtons (N) 4 40 N left 10 N Down

 Forces can occur even without contact 5

 Sir Isaac Newton was a mathematician and physicist in the early 18 th Century  Newton developed “three laws” of motion which described how objects move

 Newton’s first law of motion: An object at rest stays at rest and an object in motion stays in motion with the same speed..... unless acted on by an unbalanced force. No unbalanced forces. Rock stays at rest. No unbalanced forces. Ice skater continues with constant speed

 These object have inertia  Inertia is the tendency to not change motion 8

9 Force

10 Force Stops pulling

 A car is travelling at 100km/h when it crashes into a barricade coming to a complete stop. The driver is wearing a seatbelt but his passenger is not.  Explain each persons motion during the crash using Newton’s first law of motion  Key words: force, rest, unbalanced, inertia

 Describe forces as a push or a pull that can change an objects velocity or shape  State Newton’s First Law  Describe the concept of inertia 12

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