Hello I need help on questions 7,8,9,10. Work would be appreciated if possible thank you so much!

10. [-/2 Points] - SERPSE1010.5.P.019.CTX. 0/6 Submissions Used ASK YOUR TEACHER Your grandmother enjoys creating pottery as a hobby. She uses a potter's wheel, which is a stone disk of radius R = 0.430 m and mass M = 100 kg. In operation, the wheel rotates at 45.0 rev/min. While the wheel is spinning, your grandmother works clay at the center of the wheel with her hands into a pot-shaped object with circular symmetry. When the correct shape is reached, she wants to stop the wheel in as short a time interval as possible, so that the shape of the pot is not further distorted by the rotation. She pushes continuously with a wet rag as hard as she can radially inward on the edge of the wheel and the wheel stops in 6.00 s. (a) You would like to build a brake to stop the wheel in a shorter time interval, but you must determine the coefficient of friction between the rag and the wheel in order to design a better system. You determine that the maximum pressing force your grandmother can sustain for 6.00 sis 50.0 N. #k=:l (b) what If? If your grandmother instead chooses to press down on the upper surface of the wheel a distance r = 0.200 m from the axis of rotation, what is the force (in N) needed to stop the wheel in 6.00 5? Assume that the coefficient of kinetic friction between the wet rag and the wheel remains the same as before. (Enter the magnitude.) :lN 9. [/2 Points] - SERPSE1010.5.P.018. 0/6 Submissions Used ASK YOUR TEACHER A disk having moment of inertia 99 kg ' m2 is free to rotate without friction, starting from rest, about a fixed axis through its center. A tangential force whose magnitude can range from F = 0 to F = 50.0 N can be applied at any distance ranging from R = 0 to R = 3.00 m from the axis of rotation. (a) Find a pair of values F and R that cause the disk to complete 1.70 rev in 10.2 5. (Let F = 43.0 N be one half of the pair.) (b) Is your answer for part (a) a unique answer? How many answers exist? 0 1 pair 0 16 pairs 0 150 pairs 0 an infinite number of pairs Need Help? -' 8. [-I3 Points] - SERPSE1010.5.P.O17. 0/6 Submissions Used ASK YOUR TEACHER A mode airplane with mass 0.749 kg is tethered to the ground by a wire 50 that it ies in a horizontal circle 29.3 m in radius. The airplane engine provides a net thrust of 0.807 N perpendicular to the tethering wire. (a) Find the magnitude of the torque the net thrust produces about the center of the circle. N - m (b) Find the magnitude of the angular acceleration of the airplane. rad/s2 (c) Find the magnitude of the translational acceleration of the airplane tangent to its flight path. m/s2 Need Help? _' 7. [/2 Points] SERPSE10 10.5.P.015. 0/6 Submissions Used ASK YOUR TEACHER A grinding wheel is in the form of a uniform solid disk of radius 6.95 cm and mass 1.96 kg. It starts from rest and accelerates uniformly under the action of the constant torque of 0.594 N - rn that the motor exerts on the wheel. (a) How long does the wheel take to reach its final operating speed of 1 240 rev/min? :5 (13) Through how many revolutions does it turn while accelerating? rev Need Help? _