A 155 kg cart is pulled up a frictionless inclined plane that makes an angle of 25 degrees with the horizontal. The inclined plane is 8.0 m long. How much work must be done if the cart is to be pulled up the plane without accelerating? (5.1 kJ)

Global warming will produce rising sea levels partly due to melting ice caps but also due to the expansion of water as average ocean temperatures rise. to get some idea of the size of this effect, calculate the change in length (in m) of a column of water 1.45 km high for a temperature increase of 1.12°c. assume the column is not free to expand sideways. as a model of the ocean, that is a reasonable approximation, as only parts of the ocean very close to