A meteoroid of mass = 585 kg has a speed of 83.0 m/s when 700 km above the Earth. It is falling vertically (ignore air resistance) and strikes a bed of sand in which it is brought to rest in 3.51 m. Constants you may find useful: G = 6.67 10-11 N·m2/kg2; MEarth = 5.98 x 1024 kg; REarth = 6.38 x 106 m. Answer with at least 5 decimal places. a. How much work does the sand do to stop the meteoroid? ________ GJ b. What is the average force exerted by the sand on the meteor? ________ GN c. How much thermal energy is produced? ________ GJ

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Static and Kinetic Friction

Kinetic friction comes into existence when there are moving surfaces means in other words we can say that the force which comes into existing between moving surfaces is known as kinetic friction.