2. Who would have the most kinetic energy? A. A 80 kg student sitting in the bottom row of the bleachers.
B. A 80 kg student sitting up in the top row of the bleachers.
C. A 65 kg player running down the court
D. A 65 kg player walking down the court

Assuming weightless pulleys and 100% efficiency, what is the minimum input force required to lift a 120 n weight using a single fixed pulley?

Determine el momento angular de un rueda de 3000g moviendose a 10m/s con un radio de giro de 400cm

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.