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Gravity and Motion

Gravity and Motion. What keeps the Earth and moon in orbit?. Gravity. Gravity is a force that attracts objects towards each other The strength of gravity depends on: Mass and Distance . Inertia. Inertia is the tendency of an object to resist a change in motion.

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Gravity and Motion

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  1. Gravity and Motion What keeps the Earth and moon in orbit?

  2. Gravity • Gravity is a force that attracts objects towards each other • The strength of gravity depends on: • Mass and Distance

  3. Inertia • Inertia is the tendency of an object to resist a change in motion. • Newton’s First Law - An object at rest, stays at rest, and an object in motion stays in motion – unless acted on by an outside force.

  4. Gravity and Inertia… • Newton concluded that two forces combine to keep the Earth and moon in their orbits: Gravity and Inertia • Gravity keep Earth from flying off into space, and inertia keeps Earth from slamming into the sun.

  5. Path of revolution Earth Moon

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