3. [-/1 Points] DETAILS SERPSE10 10.2.OP.003. MY NOTES ASK YOUR TEACHER PRACTICE ANOTHER A centrifuge in a medical research laboratory rotates at an angular speed of 3,450 rev/min. When switched off, it rotates 48.0 times before coming to rest. Find the constant angular acceleration of the centrifuge (in rad/s ). Consider the direction of the initial angular velocity to be the positive direction, and include the appropriate sign in your result. rad/s2 Need Help? Read It Submit Answer 4. [-/1 Points] DETAILS SERPSE10 10.2.OP.006. MY NOTES ASK YOUR TEACHER PRACTICE ANOTHER The tub of a washing machine goes into its spin cycle, starting from rest and gaining angular speed steadily for 9.00 s, at which time it is turning at 4.00 rev/s. At this point, the lid of the washing machine is opened, and a safety switch turns it off. The tub then smoothly slows to rest in 14.0 s. Through how many revolutions does the tub rotate while it is in motion? rev Need Help? Read It 5. [-/1 Points] DETAILS SERPSE10 10.3.P.011. MY NOTES ASK YOUR TEACHER PRACTICE ANOTHER A car accelerates uniformly from rest and reaches a speed of 21.4 m/s in 8.98 s. Assume the diameter of a tire is 57.6 cm. (a) Find the number of revolutions the tire makes during this motion, assuming that no slipping occurs. rev (b) What is the final angular speed of a tire in revolutions per second? rev/s6. [-/1 Points] DETAILS SERPSE10 10.3.OP.012. MY NOTES ASK YOUR TEACHER PRACTICE ANOTHER A car traveling on a flat (unbanked), circular track accelerates uniformly from rest with a tangential acceleration of 2.15 m/s. The car makes it one quarter of the way around the circle before it skids off the track. From these data, determine the coefficient of static friction between the car and track. Need Help? Read It Watch It 7. [-/1 Points] DETAILS SERPSE10 10.7.OP.021. MY NOTES ASK YOUR TEACHER PRACTICE ANOTHER The four particles shown below are connected by rigid rods of negligible mass where y, = 5.90 m. The origin is at the center of the rectangle. The system rotates in the xy plane about the z axis with an angular speed of 5.70 rad/s. 3.00 kg 2.00 kg O 2.00 kg 4.00 m- 4.00 kg (a) Calculate the moment of inertia of the system about the z axis. kg . m2 (b) Calculate the rotational kinetic energy of the system. Need Help? Read It Watch It