Carla and Jenny Are Arguing About Whether or Not It

question 30

Multiple Choice

Carla and Jenny are arguing about whether or not it is possible to escape the gravitational field of the Earth. Carla shows Jenny a system where mass m is rE (not the Earth's radius) distant from Earth and rP (not planet P's radius) distant from planet P, the mass being on the line connecting the Earth and planet P. Carla states that the mass m has escaped if FP on m = -FE on m. Jenny disagrees. Which one, if either, is correct, and why?

• A)Carla, because the total gravitational force on m is zero at that point.
• B)Carla, because there is no gravitational force from Earth on m at that point.
• C)Carla, because there is no gravitational force on m from Earth when r > rE.
• D)Jenny, because there is a gravitational force on m from Earth no matter how great the distance from the Earth.
• E)Jenny, because the gravitational force from the Earth can only be blocked by a body that is larger than the Earth.

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Definitions:

Price of Yogurt

The amount of money required to purchase a unit or quantity of yogurt in the market.

Equilibrium Price

The cost point where the amount of a product or service that buyers want matches the amount that sellers offer, leading to equilibrium in the market.

Supply Increases

A situation where the quantity of a good or service that producers are willing and able to offer for sale rises, due to factors like lower production costs or increased demand.

Demand Curve

An illustrated chart showing the connection between a product's price and the level of demand from buyers.