A square plate of side 2 units is heated through 10° C. If the linear expansivity of the material is x, increase in the surface area of the plate is

Consider lifting a box of mass m to a height h using two different methods: lifting the box directly or lifting the box using a pulley (as in the previous part). what is wd/wp, the ratio of the work done lifting the box directly to the work done lifting the box with a pulley?