me. u are receiving this than a 60%, you wi ompleted one week me that you loans lem ber AP PHYSICS C: EVERYTHING WORKS IF YOU LET IT You are riding on a Ferris wheel that is rotating at constant speed. True or false: 1. (a) None of the forces acting on you does work on you. (b) The total work done by all of the forces acting on you is zero. (c) There is zero net force on you. (d) You are accelerating. By what factor does kinetic energy change if mass is doubled but speed is cut in half? WN A 5 kg green bowling ball is raised a distance of 2 m from rest by a vertical applied force of 60 N. (a) How much work did the applied force do on the bowling ball? (b) How much work was done by gravity? (c) What is the final kinetic energy of the bowling ball? 4. A constant 110 N force acts on an 8 kg box. The box is initially moving at 15 m/s in the direction of the force. Just 4 s of constant acceleration later and the box is moving at 37 m/s. How much work was done by the force? 5. A 0.40 kg particle moves at 3 m/s at point A and has 12.8 J of kinetic energy at point B. (a) What is the kinetic energy of the particle at point A? (b) What is the speed of the particle at point B? (c) What is the net work done on the particle as it moves from point A to point B? 6. A 4 kg particle moves along the x axis with a speed of +3 m/s as it passes through the origin. It experiences a net force F that varies with position as shown below. (a) What is the kinetic energy of the particle as it passes through the origin? (b) How much work is done by the force on the particle as it moves from x = 0 to x = 6 m? (c) What is the speed of the particle at x = 6 m? 10 00 F (N N 0 1 2 3 4 5 6 x (m What is the angle between vectors A and B if A . B = -AB? 8. Find A . B for the following vectors: (a) A = 51 - 8j and B = 61 + 3j (b) A = 61 - 4j and B = 81 + 12j (c) A = 91 + 7j and B = 21 - 5j 9 . A 4 kg purple particle is given a displacement Ar = 4mi + 7mj - 2mk. During this displacement a constant force F = -2Ni + 5Nj + 3Nk acts on the purple particle. (a) Determine the work done by the force F. (b) Assuming the purple particle starts from rest and assuming further that there are no other forces acting on the purple particle, determine the final speed of the purple particle. 10. From whence the title