A cheetah travels a distance of 50 miles in 1.5 hours. If the cheetah runs with an acceleration of 2 miles/hr2 and reaches a final velocity of 60 mi/hr, what is the cheetah’s initial velocity?

Which configuration would produce an electric current? a) rotate a coil of copper wire between two magnets. b) connect a wire between a copper and zinc strip sitting in a beaker of water. c) connect a wire to the (+) positive end of a battery and the other end to a light bulb. d) connect a wire to the negative end of a battery and the other end to a light bulb.

The free body diagram shows a box being pulled to the left up a 25-degree incline. the magnitude of the normal force is

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.