1.) A 1,882-kg car moves in the +x direction with speed 14.5 m/s. Assuming constant braking and drag forces, find the work needed to stop the car in a distance of 145 m.
2.) An object moves 4.37 m in the +x direction under the influence of a 483-N force directed 43 degrees above the x axis. Find the work done on the object. Give your answer in Joules.
3.) A 2.83-kg book slides 1.17 m along a level surface. The coefficient of kinetic friction between book and surface is0.41. Find the work done by friction. Give your answer in Joules