2, If an object with a mass of 1.7 kg changes it speed from 4.5 m/s to 7.87 m/s, what is its change in kinetic energy? Assume that the answer has proper SI Units.
3, A 1.8 kg object slides across a horizontal surface with an initial speed of 6.04 m/s. If the object comes to rest due to friction acting on it, what was the work done by friction?