(I) (a) Calculate the total force of the atmosphere acting on the top of a table that measures 1.7m× 2.6m. (b) What is the total force acting upward on the underside of the table?
In order to evaluate the force acting on a table utilize the relation of force with the pressure and the area of the table.
The area of table A =1.7m × 2.6m.
The atmospheric pressure P = 1.013 × 105 N/m2.
The force acting on the table is calculated as;
F = P × A
Substitute the values in the above relation
F = (1.013×105 N/m2) × (1.7m × 2.6m)
F = 4.47×105 N
Thus, the force acting on the top of the table is 4.47×105 N.
The atmospheric pressure on the table is equivalent at the top and underside of the table because air pressure's upward and downward forces are similar. Therefore, the force acting on the table is also the same on both sides.
Thus, the force acting on the underside of the table is also 4.47×105 N.
You hold a piece of wood in one hand and a piece of iron in the other. Both pieces have the same volume, and you hold them fully under water at the same depth. At the moment you let go of them, which one experiences the greater buoyancy force?
(a) The piece of wood.
(b) The piece of iron.
(c) They experience the same buoyancy force.
(d) More information is needed.
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