4. A boy raises a 20.0-kg rock 1.50 m above the ground. a. What force does the boy use to raise the rock? Hint: What is the rock's weight?
b. How much work does he do?

Against his financial advisor's advice, frank has decided to invest his money in some risky stocks because he once made quite a bit of money in the stock market. his decision illustrates a. the representativeness heuristic b. overconfidence c. the availability heuristic d. confirmation bias select the best answer from the choices provided