is so confusing like I’m just trying to pass. I’m stuck on my physics class in the momentum and conservation of momentum tutorials and mastery tests on edmentum.

What is the angular momentum of the bar about the axle?

Where is the potential energy throughout the loading, cocking, and releasing of the trebuchet?

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.