PLSSS HELP A 2-kg cart starting from rest rolls down a hill and at the bottom has a speed of 5 m/s . If the cart were given an initial push, so its initial speed at the top of the hill was 2 m/s , what would be its final velocity at the bottom?

Total solidification times of three casting geometries are to be compared: a sphere, a cylinder, in which the length-to-diameter ration - 1.0, and a cube. volume = 1000 cm^3 for all three shhapes, and the same casting alloy is used. a) determine the solidification times of each geometry b) based on the results of part (a), which geometric element would make the best riser? c) if the mold constant = 3.5 min/cm^2 in chvorinov's rule, compute the total solidification time for each casting.

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What is the equation for electrical work?