Using a pulley system a girl is able to lift a 400 N weight using an input force of 80 N. If the weight moves the distance of 2 m, the girls will have to pull on the pulley rope for a distance of… A. 5m
B. 2m
C. 20m
D. 10m

Atank has a shape of a cone with a radius at the top of 2 m and a height of 5 m. the tank also has a 1 m spout at the top of the tank. the tank is filled with water up to a height of 2 m. find the work needed to pump all the water out the top of the spout. (use 9.8 m/s2 for g and the fact that the density of water is 1000 kg/m3.)