<p>The model airplane in figure below is flying at a speed of <span style=\
ID: 1967790 • Letter: #
Question
<p>The model airplane in figure below is flying at a speed of <span>21</span> m/s on a horizontal circle of radius <span>17</span> m. The mass of the plane is <span>0.97</span> kg. The person holding the guideline pulls it in until the radius becomes <span>13</span> m. The plane speeds up, and the tension in the guideline becomes four times greater. What is the net work done on the plane? </p>Explanation / Answer
net work done =change in kinetic energy v1=21 now initial tension=m*v*v/r =.97*21*21/17 =25.16 now final tension=4*25.16 =100.65 so new velocity v1 100.65=.97*v1*v1/13 v1=36.72 now change in kinetic energy =m/2(36.72*36.72-25.16*25.16) =.97/2(1348.6-633.056) =347.05J
Related Questions
Hire Me For All Your Tutoring Needs
Integrity-first tutoring: clear explanations, guidance, and feedback.
Drop an Email at
drjack9650@gmail.com
drjack9650@gmail.com
Navigate
Integrity-first tutoring: explanations and feedback only — we do not complete graded work. Learn more.