Question

(10%) Problem 7: A solid disk of mass M=5.5 kg and radius R = 0.95 m rotates in the z-y plane as shown. Otheexpertta.com * 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, w, and 1. T = MR2(6/2t) X Attempts Remain Feedback: Please pay careful attention to order of operations when using division in your expression. For example 1/2 a is equivalent to 0.5 a. If you want the variable a to be in the denominator you will need to use parentheses. In this case you would need 1/( 2 a). 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 t and R? F=MR /2t) Correct! > A 33% Part (C) If, as soon as the angular speed is w = 47 rad/s, the force is immediately removed and a mass m = 1.1 kg is dropped at r = 0.49 m on the disc and sticks there, what would be the new rotational velocity of the disc in rad/s? Grade Summary wf= Deductions 0% Potential 100% HOME E sin cotan atan cosh cos asin acotan tanh Degrees tan() acos sinh() cotanh0 Radians () 7 8 1^ ^ 4 5 / * 1 2 + - 0 VO BACKSPACE 9 6 3 . DEL Submissions Attempts remaining: 15 (2% per attempt) detailed view - END CLEAR Submit Hint Feedback I give up!

Answer 1

aAngular atceleration ot he disK ベニ w and MR 2 MRbt) T=MRW Parwhesis mistake in Your soluhon ৮) FRET MRay = MRxsx-0gm २.५४२ P . Aftcr paticle stie II x =2482+ 0-264)Kgn T2146m ton servation angular 2 momeutu m, T'WETW = ५२.५४ sec wE wE 47X 2.482 rad/ 2.746