Two identical 1.50kg masses are pressed against opposite ends of a spring of force constant 1.75N/cm, compressing the spring by 25.0cm from its normal length. Find the maximum speed of each mass when it has moved free of the spring on a smooth, horizontal lab table.

Consider a u-tube whose arms are open to the atmosphere. now equal volumes of water and light oil (ρ = 49.3 lbm/ft3) are poured from different arms. a person blows from the oil side of the u-tube until the contact surface of the two fluids moves to the bottom of the u-tube, and therefore, the liquid levels in the two arms are the same. if the fluid height in each arm is 30 in, determine the gage pressure exerted by the person on the oil by blowing.