I'm currently taking grade 11 physics, and I can't seem to figure this question out for the life of me. I know this is only my first post, but I've tried to look every, asked a bunch of people and can't figure it out. I don't have a teacher since I'm doing it by Learn-At-Home. I'm hoping someone here can help me. a) Cathy takes the bus home from work. In her hand she holds a 2.0kg cake box, tied together with a string. As she ascends the bus, the box accelerates upward at a rate of 2.5m/s^2. What is the force being exerted on the string? b) Cathy sets the box on the seat beside her. The bus accelerates from rest to 60.0km/hr(16.7m/s) in 4.0s, and the box begins to slide. What is the coefficient of static friction(µ) between the box and the seat of the bus? c) A taxi suddenly cuts in front of the bus, causing the bus driver to slam on the brakes. The bus driver reduces speed from 60.0km/hr(16.7m/s) to 20.0km/hr(5.56m/s) in 1.5s. Does Cathy's cake slide forward?