Newton’s Laws of Motion

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# Newton’s Laws of Motion - PowerPoint PPT Presentation

Newton’s Laws of Motion . Notes. Newton’s Law of Universal Gravitation. All objects are attracted to one another. More mass = more gravity Closer objects = more gravity. Inertia. Objects resist changes in motion. Newton’s 1 st Law.

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### Newton’s Laws of Motion

Notes

Newton’s Law of Universal Gravitation
• All objects are attracted to one another
• More mass = more gravity
• Closer objects = more gravity
Inertia
• Objects resist changes in motion
Newton’s 1st Law
• An object at rest will stay at rest unless acted upon by an outside force.
An object in motion will stay in motion unless acted upon by an outside force such as gravity or friction.
Newton’s 2nd Law

Force = Mass x Acceleration

vs

The greater the mass of an object the greater the force needed to change its motion.

Newton’s 2nd Law

If an object has a greater mass it will take __________ force to accelerate it.

If an object has a less mass it will take __________ force to accelerate it.

Newton’s 2nd Law

If an object is pushed or pulled with a large force it will accelerate ________________.

If an object is pushed or pulled with a small force it will accelerate ________________.

Newton’s 3rd Law

For every action there is an equal and opposite reaction.

Why do planets stay in orbit around the sun?
• Planets are traveling in a
• straight line.
• The strong gravitational pull of the sun pulls the planet towards its center.
• This makes the planet orbit around the sun.