Gravitational Force

When placed at equal distances apart, the greatest gravitational attraction will be between which pair of masses?

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NGSS.HS-PS2-4

The Sun is about a million times more massive than the Earth. Why do we have a stronger gravitational attraction with Earth than the Sun?

• the sun is hollow

• the Earth has water on its surface

• we are closer to center of Sun

• we are closer to center of Earth

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NGSS.HS-PS2-4

Which statement is true?

• All objects with mass exert a gravitational force.

• Only celestial objects exert a gravitational force.

• Gravity can both push and pull objects.

• Only Earth exerts a gravitational force.

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NGSS.HS-ESS1-4

NGSS.HS-PS2-4

Find the force due to gravity if the mass of one object is 2300 kg and the mass of a second object is 4000 kg. The distance between the two objects is 0.150 m.

• 4.09 x 10^-3 N

• 244 N

• 2.7 x 10^-2 N

• 6.14 x 10^-4 N

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NGSS.HS-PS2-4

What is the proper setup of the gravitational force formula?

• F_g= Gm²/r

• F=ma

• F_g= Gr²/(m₁+m₂)

• F_g= G (m₁m₂)/r²

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NGSS.HS-PS2-4

What effect does increasing the distance between the two objects do to the gravitational force?

• The distance between two objects has no effect on the gravitational force

• It increases

• It stays the same

• It decreases

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NGSS.HS-PS2-4

• Universal gravitational constant

• Combined masses of the two objects

• Gravitational force

• Dielectric constant

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NGSS.HS-PS2-4

Why do we not feel a gravitational attraction to the objects around us?

• The masses are too small for the F_g value to be noticeable

• Gravitational forces are not found on Earth

• The radius between us and the objects is too great

• Electrical forces overpower the gravitational forces

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NGSS.HS-PS2-4

If you double the mass of m₂, by what factor will the gravitational force change?

• F/2

• 2F

• 4F

• F/4

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NGSS.HS-PS2-4

If you double the distance between m₁ and m₂, by what factor will the gravitational force change?

• F/2

• 2F

• 4F

• F/4

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NGSS.HS-PS2-4