What is the average distance that a comet orbits the sun if its period of revolution is 7.90 years

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

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

What is a good example of instantaneous speed