A 64kg wheel with radius 2.4m is rotating at 280rev/min. if you want to stop it in 30sec. (use point mass of moment of inertia) A. how much work must be done to stop it? B. what is the required power?

What is the stall speed at sea level of an airplane that weights 10000 lbs., has a wing area of 300ft^2, and a maximum lift coefficient of 1.4? what is the stall speed if flaps that double cl,max are applied?

The coefficient of friction is a number that represents the resistance to sliding between two in contact with one another.

Light from a sodium lamp passes through a diffraction grating that has 1000 slits per millimeter. the interference pattern is viewed on a screen 1.000 m behind the grating. the first (m = 1) two bright yellow fringes that are visible are 0.7288 m and 0.7300 m from the central maximum. what are the wavelengths of these two fringes?