1. A person pulls a 6.5-kg crate 40 m along a horizontal floor by a constant force FP = 89 N which acts at a 38 angle. The floor is rough and exerts a friction force FFR = 42 N Determine the work done by the friction force 2. How much net work is required to accelerate a 1054-kg car from 18 m/s to 43 m/s? 3. How much net work is required to accelerate a 1051-kg car from 23 m/s to 41 m/s? 4. Determine the Kinetic Energy done by a racquetball (40-gram) traveling at 102-mph plzz hurry