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28 Mar 2018
(1) An asteroid is moving along a straight line. A force acts along with the displacement of the asteroid and slows it down. The asteroid has a mass of 3.2 x 10^4 kg, and the force causes its speed to change from 7700 to 5700 m/s. (a) What is the work done by the force? (b) If the asteroid slows down over a distance of 2.2 x 10^6m, Determine the magnitude of the force.
(2) Rocket Man" has a propulsion unit strapped to his back. He starts from rest on the ground, fires the unit, and accelerates straight upward. At a height of 17 m, his speed is 4.9 m/s. His mass, including the propulsion unit, has an approximately constant value of 131 kg. Find the work done by the force generated by the propulsion unit.
(1) An asteroid is moving along a straight line. A force acts along with the displacement of the asteroid and slows it down. The asteroid has a mass of 3.2 x 10^4 kg, and the force causes its speed to change from 7700 to 5700 m/s. (a) What is the work done by the force? (b) If the asteroid slows down over a distance of 2.2 x 10^6m, Determine the magnitude of the force.
(2) Rocket Man" has a propulsion unit strapped to his back. He starts from rest on the ground, fires the unit, and accelerates straight upward. At a height of 17 m, his speed is 4.9 m/s. His mass, including the propulsion unit, has an approximately constant value of 131 kg. Find the work done by the force generated by the propulsion unit.
VikasLv10
17 Feb 2021
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