In this lesson, we will learn how to calculate the vertical speed that an object must have in order to escape the gravitational pull of a planet.

Q1:

Earth has a mass of 5.97×10 kg and a radius of 6,370 km. Mars has a mass of 6.42×10 kg and a radius of 3,390 kg. Calculate the ratio of the escape speed on the surface of Mars to the escape speed on the surface of Earth. Give your answer in two decimal places.

Q2:

Earth has a mass of 5.97×10 kg and a radius of 6,370 km. Calculate the ratio of the escape speed on the surface of Earth to the escape speed 20 km above the surface of Earth. Give your answer to five decimal places.

Q3:

Earth has a mass of 5.97×10 kg and a radius of 6,370 km. Calculate the escape speed of Earth. Give your answer to one decimal place.

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