A in 1975 the roof of montreals velodrome with a weight of, Ask an Expert

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(a) In 1975 the roof of Montreal's Velodrome, with a weight of 360 kN, was lifted by 10 cm so that it could be centered. How much work was done on the roof by the forces making the lift?

____ kJ

(b) In 1960 a Tampa, Florida, mother reportedly raised one end of a car that had fallen onto her son when a jack failed. If her panic lift effectively raised 4000 N(about 1/4 of the car's weight) by 5.0 cm, how much work was done by her force acting on the car?

_____J

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