A lorry of mass 5000 kg is driven across a metal beam bridge of mass 20 tonnes. The bridge is a roadway of length 10m that is supported at both ends. Two identical lorries cross the bridge at the same speed, starting at the same instant, from opposite directions. (iii) How do the reaction forces of the supports on the bridge vary as the lorries cross the bridge?

Elements Of Electromagnetics
7th Edition
ISBN:9780190698614
Author:Sadiku, Matthew N. O.
Publisher:Sadiku, Matthew N. O.
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A lorry of mass 5000 kg is driven across a metal beam bridge of mass
20 tonnes. The bridge is a roadway of length 10m that is supported at
both ends.
Two identical lorries cross the bridge at the same speed, starting at the
same instant, from opposite directions.
(iii) How do the reaction forces of the supports on the bridge vary as
the lorries cross the bridge?
Answer: the reaction force at each support
is a constant 15000N.
Transcribed Image Text:A lorry of mass 5000 kg is driven across a metal beam bridge of mass 20 tonnes. The bridge is a roadway of length 10m that is supported at both ends. Two identical lorries cross the bridge at the same speed, starting at the same instant, from opposite directions. (iii) How do the reaction forces of the supports on the bridge vary as the lorries cross the bridge? Answer: the reaction force at each support is a constant 15000N.
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