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23 Nov 2019
(1) An asteroid is moving along a straight line. A force acts alongthe displacement of the asteroid and slows it down. The asteroidhas a mass of 3.2 Ã 104 kg, and the force causes its speed tochange from 7700 to 5700 m/s. (a) What is the work done by theforce? (b) If the asteroid slows down over a distance of 2.2 Ã 106m determine the magnitude of the force.
(2) Rocket Man" has a propulsion unit strapped to his back. Hestarts from rest on the ground, fires the unit, and acceleratesstraight upward. At a height of 17 m, his speed is 4.9 m/s. Hismass, including the propulsion unit, has the approximately constantvalue of 131 kg. Find the work done by the force generated by thepropulsion unit.
(1) An asteroid is moving along a straight line. A force acts alongthe displacement of the asteroid and slows it down. The asteroidhas a mass of 3.2 Ã 104 kg, and the force causes its speed tochange from 7700 to 5700 m/s. (a) What is the work done by theforce? (b) If the asteroid slows down over a distance of 2.2 Ã 106m determine the magnitude of the force.
(2) Rocket Man" has a propulsion unit strapped to his back. Hestarts from rest on the ground, fires the unit, and acceleratesstraight upward. At a height of 17 m, his speed is 4.9 m/s. Hismass, including the propulsion unit, has the approximately constantvalue of 131 kg. Find the work done by the force generated by thepropulsion unit.
Lelia LubowitzLv2
19 May 2019
