Canals are used for transportation and some crossed canyons by going over bridge

Question

Canals are used for transportation and some crossed canyons by going over bridges.  Suppose heavily loaded barge crossed over such a water way bridge.   Which is best answer.  Explain please

a. Force on bridgee would not change when barge passed over    b. Whether or not force on bride increases or decreases depends on whether water is flowing or stationary   c. Force on bridge would become less because buoyancy effect of water on barge   d. Force downward on bridge would increase because of added weight of barge   e.  force on barge would become less because some water would be squeezed off of bridge

Explanation / Answer

answer is b

Because the barge's weight, floating, is offset by the buoyancy B. And that means a volume of water in the canal has been displaced, moved away, equal to the weight W of the barge. So the barge adds W to the bridge but the removed water removes B. In the net, we have W - B = 0 = w, zero change

Related Questions

Navigate

• Browse (All)
• Browse C
• Subjects

Integrity-first tutoring: explanations and feedback only — we do not complete graded work. Learn more.