What slows down electrons and converts some energy to heat?

An inclined plane wrapped around a metal shaft is a a. lever b. screw c. pulley d. wedge

The 10-kg double wheel with radius of gyration of 125mm about o is connected to the spring of stiffness k = 600 n/m by a cord which is wrapped securely around the inner hub. if the wheel is released from rest on the incline with the spring stretched 225 mm, calculate the maximum velocity v of its center o during the ensuing motion. the wheel rolls without slipping

Akg a of 55 m at an of 11 ? . if is at 98 km/h,be ?