1. Distinguish between the conservation of mechanical energy and the conservation of total energy. 2. Is mechanical energy conserved in real situations? Is the total energy conserved? Explain. 3. Discuss the relationship between work and energy for a car moving with a constant speed (a) up an incline and (b) down an incline. 4. Under what conditions would the frictional forces be expected to be equal in magnitude for a car moving up an incline and a car moving down an incline