A truck T has a weight of 8,000 lb and is traveling along a portion of a road

defined by the lemniscate r

2 = 0.2(106)

cos 2θ , where r is measured in feet

and θ is in radians. If the truck

maintains a constant speed of vr = 4 ft/s,

determine the magnitude of the

resultant frictional force which must be

exerted by all the wheels to maintain

the motion when = 0

Aseries piping system conveys methyl alcohol. the system consists of 70 m of 1- nominal pipe follow by 50 m of 2-nominal pipe, both schedule 40 commercial steel. the 1-nominal pipe contains 3 90° elbows (regular) anda fully open gate valve, all threaded. the pressure drop through the system is 150 kpa. determine the volume flow rate through the system that is horizontally laid.