7) A 31.8 kg boy sits on a 16.0 kg tire swing. The tire is suspended from a massless rope that has a length of 2.60 m, a

[answerhappygod]

7 A 31 8 Kg Boy Sits On A 16 0 Kg Tire Swing The Tire Is Suspended From A Massless Rope That Has A Length Of 2 60 M A 1 (141.37 KiB) Viewed 10 times

7) A 31.8 kg boy sits on a 16.0 kg tire swing. The tire is suspended from a massless rope that has a length of 2.60 m, and the rope is attached to a tree branch that is 3.35 m above flat ground. Tree Branch L 31° 7a. A friend exerts a horizontal force on the boy in order to maintain an angle of 31° between the rope and an imaginary vertical line between the tree branch and the ground. What is the magnitude of the force that the friend exerts on the boy+tire combination? You must include a free-body diagram with your work to receive full credit. Be sure to include the types of forces acting, their directions, and their magnitudes. Ffriend = 281.47 N (1) 7b. When the friend no longer exerts the force found in part 7a, the boy swings back and forth. When he reaches the lowest point of his motion, the boy is moving with a speed of 2.697 m/s. What is the tension in the rope when the boy is at the lowest point of his motion? You must include a free-body diagram with your work to receive full credit. Be sure to include the types of forces acting, their directions, and their magnitudes. T = 602 N (2) 7c. What is the boy's acceleration (magnitude and direction) when he's at the lowest point of his motion? a = 2.797 m/s2, straight up (3)