A merry-go-round accelerates from rest to 0.68 rad/s in 34 s. Assuming the merry-go-round to be uniform disk of radius 7.0 m and mass 31,000 kg. The moment of inertia of a uniform disk of mass M and radius R rotating about its axis is MR2/2. Calculate its moment of inertia.

Aprojectile is launched from ground level with an initial velocity of v 0 feet per second. neglecting air resistance, its height in feet t seconds after launch is given by s equals negative 16 t squared plus v 0 t. find the time(s) that the projectile will (a) reach a height of 192 ft and (b) return to the ground when v 0equals112 feet per second. (a) find the time(s) that the projectile will reach a height of 192 ft when v 0equals112 feet per second. select the correct choice below and, if necessary, fill in the answer box to complete your choice.