Gravitation

What states that "every object in the universe attracts every other object"?

• Law of Universal Gravitation
• Newton's First Law of Motion
• My mother
• Inertia & gravity

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Which of the following is Newton's Law on Gravitation?

• F=Gm₁m₂/r
• F = Gm₁m₂/r²
• F = Gm₁m₂/2r
• F = m₁m₂/2r

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Two factors effecting the magnitude of the force of gravity between 2 objects are...

• mass and distance 
• mass and matter
• distance and weight 
• weight and mass

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NGSS.HS-PS2-4

If I double the distance between two objects, what happens to their gravitational Force?

• 4x bigger
• 4x smaller
• 2x bigger
• 2x smaller

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NGSS.HS-PS2-4

Calculate the gravitational force between a 15-kg chinchilla and a 65-kg dog which are separated by 0.30 m.

• F_g = 3.7*10^-8 N

• F_g = 1.3*10¹² N

• F_g = 1.1*10⁵ N

• F_g = 7.2*10^-7 N

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NGSS.HS-PS2-4

What would the gravitational force be between the Sun and Mars if they were 2.3*10¹¹ m apart? The masses for the Sun and Mars are 1.99*10³⁰ kg and 6.42*10²³kg, respectively.

• F_g = 3.8*10¹⁵ N

• F_g = 2.8*10^-42 N

• F_g = 1.6*10²¹ N

• F_g = 4.6*10^-75 N

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NGSS.HS-ESS1-4

NGSS.HS-PS2-4

The picture shows the gravitational field in the space surrounding the Earth. What is creating this gravitational field?

• The gravitational force.

• The mass of the Earth.

• The distance of the Earth.

• The universal gravitational constant.

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Kepler's Second Law states

• objects attract other objects with a force that is directly proportional to the product of their masses

• the square of the ratio of the periods of any two planets revolving around the Sun is equal to the cube of the ratio of their average distance from the Sun

• An imaginary line joining a planet and the sun sweeps out an equal area of space in equal amounts of time.

• Planets move about the Sun in an elliptical orbit with the Sun at one of the foci.

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NGSS.HS-ESS1-4

Kepler's 2nd Law deals with 

• the shape of the planets' orbits
• the speed/area the planet travels 
• the length of time it takes the planet to orbit the sun

Kepler's first law states that the orbits of the planets are oval in shape or 

• ellipses
• perfect circles

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