Question

A wooden block is floating in a trough of water. If the trough falls freely, the upthrust on the wooden block will be

1. same as before
2. more than earlier
3. Zero
4 . None

Answer 1

Answer:

1. Same as before the answer mark me brainliest

Answer 2

Buoyancy, or upthrust, is an upward force exerted by a fluid that opposes the weight of a partially or fully immersed object

Initially wooden block is floating in a trough of water and suddenly trough starts falling freely.

Upthrust on freely falling wooden block

Initially when block was floating the upthrust on the block was
U =mg
Finally when block starts falling freely a pseudoforce acts upwards whose value is equal to Fp=mg
Net forces after freely falling
Buoyancy force (upthrust ) + pseudoforce = weight of body
U + mg =mg
U = 0 N
3.
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