(adsbygoogle = window.adsbygoogle || []).push({}); 1. A model airplane is flying at a speed of 22 m/s on a horizontal circle of radius 16m. The mass of the plane is 0.90 kg. The person holding the guidelines pulls it in until the radius of the circle becomes 14m. The plane speeds up, and the tension in the guideline becomes four times greater. What is the net work done on the plane

2. KE=1/2(mv^2),

W=KE final-KE initial

3. Obviously the radius and tension is throwing me off in the problem. I know how to find the KE.. I know the answer is suppose to be 5.4*10^2J.. Can someone lead me in the right direction or help with this problem

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# Model Airplane-Work-Energy Theorem and Kinetic Energy

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