1-) A spring with spring constant 18.5N/m hangs from the ceiling. A 570g ball is attached to the spring and allowed to come to rest. It is then pulled down 7.00cm and released. What is the time constant if the ball's amplitude has decreased to 3.00cm after 57.0 oscillations?
2-) A 56.0kg cheerleader uses an oil-filled hydraulic lift to hold four 110kg football players at a height of 1.30m. If her piston is 19.0cm in diameter, what is the diameter of the football players' piston?
3-) A 0.500m -diameter vat of liquid is 2.20m deep. The pressure at the bottom of the vat is 1.30atm. What is the mass of the liquid in the vat?