A ball rolls at a speed of 4 km/h toward the back of a bus traveling forward at a speed of 35 km/h. What is the magnitude of the ball’s velocity relative to the ground? *

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

Suppose a wire with a current is pushed upward by a magnetic field. how would the wire move if the direction of the current reversed? explain your answer.

You notice the birds sitting on the electrical wires which of the following explain why the birds don't get shocked