Class Management | Help Week9 Begin Date: 7/27/2023 12:01:00 AM -- Due Date: 8/8/2023 11:59:00 PM End Date: 8/10/2023 11:59:00 PM 5%) Problem 20: A rod of mass M= 103 g and length L - 38 cm can rotate about a hinge at its left end and is initially at rest. A putty ball of mass m = 15 g, moving with speed V= 5 m/s, strikes the rod at angle 0 = 240 a distance D = L/2 from the end and sticks to the rod after the collision. D M m Otheexpertta.com 33% Part (a) What is the total moment of inertia, I, with respect to the hinge, of the rod-ball-system after the collision? 4 33% Part (b) Enter an expression for the angular speed @ of the system immediately after the collision, in terms of m, V, D, 0, and I. 4 33% Part (c) Calculate the rotational kinetic energy, in joules, of the system after the collision. Erot=1 Grade Summary Deductions 0% Potential 100% sin() cos() tan( It ( ) 7 8 9 HOME Submissions cotan( asin( E 14 5 6 Attempts remaining: 999 atan() acotan( 1 2 3 (0% per attempt) sinh( detailed view cosh() tanh() cotanh( + - 0 Degrees . Radians Submit Hint I give up! Hints: 0% deduction per hint, Hints remaining: 2 Feedback: 0% deduction per feedback.Class Management | Help Week9 Begin Date: 7/27/2023 12:01:00 AM -- Due Date: 8/8/2023 11:59:00 PM End Date: 8/10/2023 11:59:00 PM (5%) Problem 21: A solid disk of mass M= 9.5 kg and radius R = 0.85 m rotates in the =-y plane as shown. Otheexpertta.com 4 33% Part (a) Write an expression for the magnitude of the net torque required for the disc to achieve a given rotational speed when starting from rest in terms of M, R, c, and t. Grade Summary Deductions 0% Potential 100% B ( ) 7 8 9 HOME Submissions I 4 5 6 Attempts remaining: 999 d g h 1 2 3 (0% per attempt detailed view k M + - 0 R VO Submit Hint I give up! Hints: 0% deduction per hint. Hints remaining: 3 Feedback: 0% deduction per feedback. 33% Part (b) What is an expression for the force that produces this torque if it is applied to the edge of the disc and in a direction that is tangent to the disc in terms of r and R? 4 33% Part (c) If, as soon as the angular speed is w = 47 rad/s, the force is immediately removed and a mass m = 0.55 kg is dropped at r = 0.73 m on the disc and sticks there, what would be the new rotational velocity of the disc in rad/s?Class Management | Meip Week9 Begin Date: 7/27/2023 12:01:00 AM -- Due Date: 8/8/2023 11:59:00 PM End Date: 8/10/2023 11:59:00 PM (5%) Problem 22: An ice skater is spinning at 6.8 rev/s and has a moment of inertia of 0.36 kg . m. 4 33% Part (a) Calculate the angular momentum, in kilogram meters squared per second, of the ice skater spinning at 6.8 rev/s. L1 = 1 Grade Summary Deductions 0% Potential 100% sin cos() tan( TI ( ) 7 8 9 HOME Submissions cotan() asin() acos() E 4 5 6 Attempts remaining: 999 (0% per attempt) atan() acotan() sinho 1 2 3 detailed view cosh() tanh( cotanh() + 0 Degrees O Radians VO Submit Hint I give up! Hints: 0% deduction per hint. Hints remaining: 1 Feedback: 0% deduction per feedback. 4 33% Part (b) He reduces his rate of rotation by extending his arms and increasing his moment of inertia. Find the value of his moment of inertia (in kilogram meters squared) if his rate of rotation decreases to 0. 75 rev/s. 4 33% Part (c) Suppose instead he keeps his arms in and allows friction of the ice to slow him to 3.25 rev/s. What is the magnitude of the average torque that was exerted, in N . m, if this takes 19 s