5th grade ch. 13 lesson 3 what are newton's laws of motion
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Ch. 13Lesson 3
What are Newton’s laws of motion?
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net force• combination of all forces acting
on an object• determines whether an object will
start moving, stop moving, or change direction
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equilibrium• state when in which all forces acting on an object are in balance
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Newton’s laws of motion
Sir Isaac Newton
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• objects at rest tend to remain at rest & objects in motion tend to stay in motion unless a net force acts on it
1st law of motion
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inertia• tendency of an
object to resist any change in motion
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examples of inertia1. quarter on elbow trick
(stationary object)
2. passenger in moving car moving forward when car stops (remain in motion)
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passenger & luggage in moving car moving forward when car stops
(remain in motion)
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2nd law of motion
•motion of an object changes only when some force acts on the object
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acceleration•rate @ which velocity of an object changes over time
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• A force must be applied to an object to make it start moving, stop moving, speed up, slow down, or change direction.
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3rd law of motion• For every action force
there is an equal & opposite reaction force.
• Forces (action force & reaction force) always occur in pairs
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2nd law of motion
•motion of an object changes only when some force acts on the object
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• objects at rest tend to remain at rest & objects in motion tend to stay in motion unless a net force acts on it
1st law of motion
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3rd law of motion• For every action force
there is an equal & opposite reaction force.
• Forces (action force & reaction force) always occur in pairs
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1st law of motion
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• inertia= tendency of an object to resist any change in motion
1st law of motion
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2nd law of motion•Acceleration-rate @ which velocity of an object changes over time