Question 1
Refer to Figure 1. Describe the Law of Universal Gravitation and how it accounts for the variation in gravitational field strength observed.
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Physics · Unit 3 · Gravity and motion · Projectile motion
Describe the Law of Universal Gravitation.
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Question 2
A satellite orbits a planet at a distance \( r \) from the planet's centre, experiencing a gravitational force \( F \). The satellite is moved to a new orbit at distance \( 3r \) from the planet's centre. Which statement correctly describes the gravitational force in the new orbit according to the Law of Universal Gravitation?
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Question 3
A space probe of mass \(m\) travels from Earth's surface (where it experiences gravitational force \(F_E\)) to a point in space at distance \(3R_E\) from Earth's centre, where \(R_E\) is Earth's radius. The diagram shows the gravitational force \(F\) on the probe as a function of its distance \(r\) from Earth's centre. Which statement correctly describes how the Law of Universal Gravitation applies to this situation?
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