1. How much Gravitational Potential Energy does an 85 kg hiker have if she climbs to the top of a 100-meter tall hill? . 98 J b. 850 J C. 83300 J d. 708,050 J 2. What requires more energy? i) Lifting a 50 kg sack vertically 2 meters i) Lifting a 25 kg sack vertically 4 meters a. Lifting the 50 kg sack b. Lifting the 25 kg sack C. Both require the same amount d. Cannot be determined without more information 3. What is the kinetic energy stored in a 250 kg car traveling at 20 m/s? a. 2,500 J b. 5,000 J C. 25,000 J d. 50,000 J 4. What does the following LOL diagram tell you about the behavior of the object? Ek Et Ek Et Ek Et . The object is speeding up b. The object is slowing down C. The object is being dropped d. The object is compressing a spring 5. It takes 40 J of work to push a large box 4 m across a floor. Assuming that the push is in the same direction as the box's displacement, what is the size of the net force on the box? a. 4 N b. 10 N C. 40 N d. 160 N