Amy has a mass of 30 kg, and she is riding a skateboard traveling 5 m/s. what is her momentum?

Which simple machine is not part of this compound machine? a. lever b. pulley c. inclined plane d. wheel and axle

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.

What is the single most important equation in all of physics?