V ran A Starting from rest, a DVD steadily accelerates to 400 rpm in 1.0 s, rotates at this angular speed for . . 9 3.0 s, then steadily decelerates to a halt in 2.0 5. How many revolutlons does 't make. n = rev The figure shows the angular-velocity-versus-time graph for a particle moving in a circle. (Figure 1) How many revolutions does the object make during the first 4 s? Express your answer to two significant figures and include the appropriate units. LA ? 0 = Value Units Submit Request Answer Provide Feedback Figure Next > w (rad/s) 20- 10- t (s) 2 3 4A turbine is spinning at 4200 rpm. Friction in the bearings is so low that it takes 19 min to coast to a stop How many revolutions does the turbine make while stopping? .Am-soO? A0 = rev Your 64-cm-diameter car tire is rotating at 3.5 rev/s when suddenly you press down hard on the accelerator. After traveling 280 m, the tire's rotation has increased 10 6-7 rev/s. Express your answer with the appropriate units. What was the tire's angular acceleration? Give your answer in rad/s2 . a = rad / s2