? hw 11 Problem 11.66 11 of 12 ? Part A The L-shaped object in the figure(Figure

Question

? hw 11 Problem 11.66 11 of 12 ? Part A The L-shaped object in the figure(Figure 1) consists of three masses connected by light rods. Find the work that must be done on this object to accelerate it from rest to an angular speed of 220 rad/s about the axis Express your answer using two significant figures W 45.98 Submit Previous Answers Request Answer Figure ? 1of1) incorrect; Try Again; 3 attempts remaining Part B 9.0 kg About the y axis Express your answer using two significant figures 1.0 m W 45 1.2kg 2.0m 2.5kg Previous Answers Request Answer

Explanation / Answer

Solution-

a) Moment of inertia along the x-axis is given by
       I = (9.0 kg) (1.0m)^2
Now
          ?= I ?
Here ? = 2.20rad/s2
    ? =  (9.0 kg) (1.0m)^22 ( 2.20rad/s2)

=178.2 N-m
B) Moment of inertia along the y- axis is given by
       Iy = (2.5 kg)( 2.0m)2

          ?=Iy  ?
    Here ? = 2.20 rad/s2
    ? = (2.5 kg) (2.0m)2( 2.20rad/s2)  

=55 N-m
C)Moment of inertia along the z-axisx is given by
       Iz = (2.5 kg)( 2.0m)2 + (9.0 kg) ( 1.0m)2
   ? =[(2.5 kg) ( 2.0m)2 + (9.0 kg) (1.0m)2]( 2.20rad/s2)  

= 233.2 N-m

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