To be rescued from the roof of a burning building, a62-kg manmust be able to jump straight up and catch hold of a rope ladderhanging from a helicopter. He has to raise his center of mass2.00 mabove the roof to do so.
If he crouches down such that his center of mass is 0.50 m abovethe roof and his feet leave the roof when his center of mass is1.05 m above the roof, what minimum force must he exert on the roofto reach the ladder?
A typical candy bar contains about Ecandy = 900 kJ offood energy. How many candy bars does this jump require?
