Question

A sphere of iron and another of wood of the same radius are held under water. Compare the upthrust on the two spheres...

Answer 1

the upthrust will be same on both objects because the same surface area

but the wood will have a great impact of upthrust because the wood have a smaller mass and iron sphere will have less impact of upthust because of greater mass of iron spbere

Answer 2

Answer:sphere of iron and wood have equal radius :Have equal volume

Also,V=4/3×22/7×r3 (cube)

And hence displace eqUal volume of water =UPTHRUST

And have equal upthrust i.e.ratio of thrust =1:1

Explanation:HOPE IT HELPS YOU!!