A merry-go-round on a playground consists of a horizontal solid disk with a weight of 795 N and a radius of 1.49 m. A child applies force tangentially to the edge of the
disk to start it from rest and rotate at 47.79 rmp (revolution per minute) in 5.00 s.
(a) Calculate the angular acceleration
(b) Calculate the net torque required for such motion.
(c) Calculate the rotational kinetic energy for such motion.

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Astone is dropped from the upper observation deck of a tower, 250 m above the ground. (assume g = 9.8 m/s2.) (a) find the distance (in meters) of the stone above ground level at time t. h(t) = (b) how long does it take the stone to reach the ground? (round your answer to two decimal places.) s (c) with what velocity does it strike the ground? (round your answer to one decimal place.) m/s (d) if the stone is thrown downward with a speed of 2 m/s, how long does it take to reach the ground? (round your answer to two decimal places.) s