A block of mass 8.9 kg is suspended from a pulley via a light cord. The pulley has a mass of 6.8 kg and a radius of 19 cm. Treat the pulley as a disk. If the
block is initially at a height of 2 meters above the ground, how long does it
take to reach the floor?
Report your answer to three decimal places.

Will give brainliest! jay rides his 2.0-kg skateboard. he is moving at speed 5.8 m/s when he pushes off the board and continues to move forward in the air at 5.4 m/s. the board now goes forward at 13 m/s. a. determine jay’s mass. b. determine the change in the internal energy of the system during this process.(express your answer to two significant figures and include the appropriate units.)