Unit 4: Universal Gravitation

Which of the following would be a proper setup for this problem: A 60 kg person is standing on earth's surface (radius = 6.4x10⁶ m). The mass of earth is 6x10²⁴ kg.

• $\frac{\left(6.67x10^{-11}\right)\left(60\right)\left(6x10^{24}\right)}{\left(6.4x10^6\right)^2}$

• $\frac{\left(6.67x10^{-11}\right)\left(60\right)\left(6.4x10^6\right)}{\left(6x10^{24}\right)^2}$

• $\frac{\left(6.67x10^{-11}\right)\left(60\right)\left(6x10^{24}\right)}{\left(6.4x10^6\right)^{ }}$

• $\frac{\left(60\right)\left(6x10^{24}\right)}{\left(6.4x10^6\right)^2}$

If two objects are moved to a distance 3 x further than they were before. How would the gravity force between them change?

• It would be 3x larger.

• It would be 1/3 as large

• It would be 1/9 as large

• It would be 9x larger

Which diagram best shows the gravitational interaction between Earth and a satellite?

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Which image below best represents the forces acting on the Earth due to the Sun's gravitational field?

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How does the gravitational force exerted by the Earth on you compare with the gravitational force exerted by you on the Earth?

• The Earth pulls on me more than I pull on the Earth.

• I pull on the Earth more than the Earth pulls on me.

• The Earth pulls me the same amount as I pull on the Earth.