(i) Using Bernoulli's equation Ps + pgha + pui= Pz+ psha+ poz and ignoring the small height difference between top and bottom sides of the wings. Calculate the percentage increase in the speed
of the air on the upper surface of the wing to the lower surface (p=1.2 kg/m'). (2)​

A1-lb collar is attached to a spring and slides without friction along a circular rod in a vertical plane. the spring has an undeformed length of 5 in. and a constant k =25 lb/ft. knowing that the collar is released from being held at a determine, the speed of the collar and the normal force between the collar and the rod as the collar passes through b.