8. A crate of bananas weighing 3000 N is shipped from South America to New York, where it is unloaded by a dock worker. The worker lifts the crate by pulling with a force of 200 Non
the rope of a pulley system. What is the mechanical advantage of the pulley system?
Variables:
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What is work? how much work is done to move an object 0 meters?

In positive numbers less than 1, the zeros between the decimal point and non zero are significant

The ratio of lift to drag l/d for a wing or airfoil is an important aerodynamic parameter, indeed, it is a direct measure of the aerodynamic efficiency of the wing. if a wing is pitched through a range of angle of attack, l/d first increases, then goes through a maximum, and then decreases. consider an infinite wing with an naca 2412 airfoil. estimate the maximum value of l/d. assume that the reynolds number is 9x10^6.