A lorry of weight 20000N is brought to rest on a uniform bridge, by applying brakes, as shown in the figure below. The weight of the bridge is 60000N and is 20m long. It is supported at P and Q. calculate the reactions at P and Q.

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1 Answer

anonymous · Answer 1 · 2021-07-29T12:30:30+0000

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Taking moments about to end Q
60,000 x 10 + 20,000 x 14 = Tp x 20
Tp = 44,000N
But TQ+Tp = 60,000 + 20,000
TQ= 80,000 - 44,000 = 36,000