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Question

The weight of water displaced by an iron object is 10 kg. The buoyant force acting on the iron object is___________.


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Solution

Step 1: Given Parameter

The weight of water displaced by water, m=10kg

Step 2: Concept used

Buoyant force:

  1. The buoyant force is the upward force exerted on an item immersed in a fluid, either completely or partially.
  2. Upthrust is the name for this upward force. A body submerged partially or totally in a fluid looks to lose weight i.e. appears to be lighter, due to the buoyant force.

Step 3: Formula Used

Use the expression below to calculate the buoyant force.

BuoyantforceW=Weightofliquiddisplacedbythebodymg

W=mg...(1)

Here W is the buoyant force acting, m is the weight of water displaced, and g is the acceleration due to gravity = 9.8m/s2

Step 4: Calculation

Substitute the given values in equation (1).

W=10×9.8

W=98N

Hence, the buoyant force acting on the iron object is 98N.


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