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Q. A 17740 kg airplane lands with a speed of 81.00m/s on a stationary aircraft carrier deck that is 115 m long. Find out the work done by nonconservative forces in stopping the plane.

Q. Muscles are attached to bones by means of tendons. The highest force that a muscle can exert is directly proportional to its cross-sectional area at the widest point. We can express this relationship mathematically as, where (sigma) is a proportionality constant.

Unexpectedly, is about the similar for the muscles of all animals and has the numerical value of in SI units.

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