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An asteroid is moving along a straight line. A force acts along the displacement of the asteroid and slows it down. The asteroid has a mass of 5.6× 104 kg, and the force causes its speed to change from 7800 to 5600m/s.
(a) What is the work done by the force?
(b) If the asteroid slows down over a distance of 1.3× 106 m determine the magnitude of the force.
Mass of electron = 9.11 x 10-31 kg, h = 6.626 x 10-34 J.s, c = 3 x 108 m/s; 1 eV = 1.6 x 10-19 J, Mass of a proton or neutron = 1836 x mass of electron, Mass of aluminum atom = 26.9 amu, 1amu = 1.66 x10-27 kg.
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