A sphere of mass m rests against a friction-less vertical wall while joined to one
of its points A by means of a light and in-
extensible string connected to the center of
the sphere (Figure 10.33). If the angle between
the vertical wall and the string is a,
determine, in terms of m, g and a the tension
in the string and the reaction at the wall.​

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.