4. You are carrying a 150 N box. a. How much work do you do you lift it from the floor to a height of 1.5 m at a constant speed? b. How much work do you do you carry it a constant height across the room? c. How much work do you do you lower it to the floor from a height of 1.5 m at a constant speed?

5. A 60 kg man climbs a 3 m tall flight of stairs. What work was done on the man by the force of gravity?

6. A Bloomin' Onion from Outback has 1950 Calories, which is 8158800 J. If a 75 kg person ate an entire Bloomin' Onion and then climbed stairs at a constant rate to burn off all of the calories, how high would the person need to climb?