Rex and Rover, two mischievous pet dogs, are having a tug-of-war with their favorite toy, a poor old teddy-bear named “Teddy”. Rex and Rover each have hold of one of Teddy’s arms, and are pulling in opposite directions. They are evenly matched, at least for now, so that Teddy is not moving. Which of the following statements about the forces acting on Teddy is NOT true?
A. The net force acting on Teddy is zero. B. There are no forces acting on Teddy, since he’s not moving. C. The sum of the x-components of the forces acting on Teddy is zero. D. The sum of the y-components of the forces acting on Teddy is zero. E. Teddy’s acceleration is zero.
5. Frank the spider (we’ll be meeting him again in long-answer question 3) has made it to the final round of the hit spider TV game show “American Ninja Spider Warrior”. Hanging on the end of a thread of spider silk, Frank is being swung CCW in uniform circular motion, as shown in the diagram. To win the grand prize, Frank must cut his silk thread at the correct position so that he will land on the shaded platform shown in the diagram. At which position on the circle should Frank cut his thread?