You attach a cart with a mass of 1500 g to a spring and compress the cart- spring system so that the cart is located 40 cm behind the spring's equilibrium
position. The spring constant for the spring is 65 N/m. When the spring is
released, what is the cart's velocity as it passes the equilibrium position?

Asmall 21 kilogram canoe is floating downriver at a speed of 1 m/s. what is the canoe's kinetic energy?

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.

In a good thermo flask the main cause of heat loss is