NEED HELP ASAP (WORK PROVIDED) A ball is fired straight horizontally from a 20 meter high cliff. It lands 30 meters from the base of the cliff.

Find the initial speed of the ball.

Find the speed( total speed) of the ball after 1.2 seconds.

When you turn on a battery-operated device, an electrical circuit is

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

If a refrigerator is a heat pump that follows the first law of thermodynamics, how much heat was removed from food inside of the refrigerator if it released 380j of energy to the room?