An 90-kg satellite orbits a distant planet with a radius of 4000 km and a period of 280 min. From the radius and period, you calculate the satellite's acceleration to be 0.56 m/s2. What is the gravitational force on the satellite?

A. 50.4 N
B. 90 N
C. 720 N
D. 12,000 N


Answer: A. 50.4 N

Physics & Space Science

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Within Earth's atmosphere the ozone layer is located:

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How many calories of heat are required to raise the temperature of 4 kg of water from 50°F to the boiling point?

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