Universal Gravitation

A space probe is launched into space from Earth's surface. Which graph represents the relationship between the magnitude of the gravitational force exerted on Earth by the space probe and the distance between the space probe and the center of Earth?

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The diagram shows two bowling balls, A and B, each having a mass of 7 kilograms, placed 2 meters apart. What is the magnitude of the gravitational force exerted by ball A on ball B?

• 8.17 x 10^-⁹ N

• 1.63 × 10^-⁹ N

• 8.17 x 10^-10 N

• 1.17 x 10^-10 N

A 60-kg physics student would weigh 1560 N on the surface of planet X. What is the magnitude of the acceleration due to gravity on the surface of planet X?

• 0.038 m/s²

• 6.1 m/s²

• 9.8 m/s²

• 26 m/s²

Earth's mass is approximately 81 times the mass of the Moon. If Earth exerts a gravitational force of magnitude F on the Moon, the magnitude of the gravitational force of the Moon on Earth is

• F

• F/81

• 9F

• 81F

An object weighs 100 newtons on Earth's surface. When it is moved to a point one Earth radius above Earth's surface, it will weigh

• 25 N

• 50 N

• 100 N

• 400 N

A container of rocks with a mass of 65 kilograms is brought back from the Moon's surface where the acceleration due to gravity is 1.62 meters per second². What is the weight of the container of rocks on Earth's surface?

• 638 N

• 394 N

• 105 N

• 65 N

The graph below represents the relationship between gravitational force and mass for objects near the surface of Earth. The slope of the graph represents the

• acceleration due to gravity

• universal gravitational constant

• momentum of objects

• weight of objects

A person weighing 785 newtons on the surface of Earth would weigh 298 newtons on the surface of Mars. What is the magnitude of the gravitational field strength on the surface of Mars?

• 2.63 N/kg

• 3.72 N/kg

• 6.09 N/kg

• 9.81 N/kg

An astronaut weighs 8.00 × 10² newtons on the surface of Earth. What is the weight of the astronaut 6.37 x 10⁶ meters above the surface of Earth?

• 0.00 N

• 2.00 x 10² N

• 1.60 x 10³ N

• 3.20 x 10³ N

Which diagram best represents the gravitational field lines surrounding Earth?

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