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# 5th Grade Ch. 13 Lesson 3 What are Newton's laws of motion

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### Transcript

• 1. Ch. 13 Lesson 3 What are Newton’s laws of motion?
• 2. net force
• combination of all forces acting on an object
• determines whether an object will start moving, stop moving, or change direction
• 3. equilibrium
• state when in which all forces acting on an object are in balance
• 4. Newton’s laws of motion Sir Isaac Newton
• 5.
• objects at rest tend to remain at rest & objects in motion tend to stay in motion unless a net force acts on it
1 st law of motion
• 6. inertia
• tendency of an object to resist any change in motion
• 7. examples of inertia
• quarter on elbow trick (stationary object)
• passenger in moving car moving forward when car stops (remain in motion)
• 8. passenger & luggage in moving car moving forward when car stops (remain in motion)
• 9. 2 nd law of motion
• motion of an object changes only when some force acts on the object
• 10. acceleration
• rate @ which velocity of an object changes over time
• 11.
• A force must be applied to an object to make it start moving, stop moving, speed up, slow down, or change direction.
• 12. 3 rd law of motion
• For every action force there is an equal & opposite reaction force.
• Forces (action force & reaction force) always occur in pairs
• 13. Name that law !
• 14. 2 nd law of motion
• motion of an object changes only when some force acts on the object
• 15.
• objects at rest tend to remain at rest & objects in motion tend to stay in motion unless a net force acts on it
1 st law of motion
• 16. 3 rd law of motion
• For every action force there is an equal & opposite reaction force.
• Forces (action force & reaction force) always occur in pairs
• 17. 1st law of motion
• 18.
• inertia= tendency of an object to resist any change in motion
1 st law of motion
• 19. 2 nd law of motion
• Acceleration-rate @ which velocity of an object changes over time