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MrWinesy
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A television transmitting antenna is placed on top of a mast which is 30m high and 300mm in diameter. The mast is on top of a tall building. The wind blows at 35m/s and at normal atmospheric pressure (1.225kg/m^3). If the drag coefficient for the mast is 0.2. calculate:
(i) the total drag force on the mast.
(ii) the bending moment at the base of the mast.
(i) Fd=.5*Cd*ρ*U^2*A=.5*.2*1.225*35^2*(30*0.3)=1350.6N
(ii) but how do you do this question?
(the answer is M=20.26kNm but i do not know how to get there)
thank you in advance for your help.
(i) the total drag force on the mast.
(ii) the bending moment at the base of the mast.
(i) Fd=.5*Cd*ρ*U^2*A=.5*.2*1.225*35^2*(30*0.3)=1350.6N
(ii) but how do you do this question?
(the answer is M=20.26kNm but i do not know how to get there)
thank you in advance for your help.