Which describes the relationship between potential and kinetic energy of a ball thrown up in the air as it falls back to the ground?

a.
gravitational potential energy increases; kinetic energy increases.

b.
kinetic energy equals gravitational potential energy.

c.
kinetic energy increases; gravitational potential energy decreases.

d.
the mass of the ball is required to answer this.

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.