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Q. A flight attendant pulls her 63N flight bag a distance of 308m along a level airport floor at a constant velocity. The force she exerts is 45N at an angle of 57° above horizontal. Find the work she does on flight bag.

Q. A steel aircraft carrier is 365m long when moving throughout the icy North Atlantic at a temperature of 1.6°C. By how much does the carrier lengthen when it is travelling in the warm Mediterranean Sea at the temperature of 22 °C?

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