What is the Upward Force of Water on a Sinking Stone?

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To determine the upward force of water on a sinking stone weighing 3.0 kg and accelerating downwards at 3.5 m/s², the net force was calculated using Newton's second law. The net force (Fnet) was found to be 10.5 N, derived from the equation Fnet = ma. By applying the equation G - Fwater = ma, where G is the weight of the stone, the upward force of water (Fwater) was calculated. The calculations showed that Fwater equals 18.9 N, indicating the force exerted by the water on the stone. This solution effectively demonstrates the relationship between weight, buoyancy, and acceleration in fluid dynamics.
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Homework Statement



A 3.0 kg stone is sinking in water at 3.5m/s(squared) what is the upward Force of the water on the stone?

Homework Equations


yeahh it seems simple but I am very bad at physics so..
i put M=3.0kg A=3.5m/s (squared)


The Attempt at a Solution


i found out Fnet is 10.5 because of Fnet= (3.0)(3.5)
 
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there is the upward force and the weight acting. The resultant of those two give the net force
 
rock.freak667 said:
there is the upward force and the weight acting. The resultant of those two give the net force

G-Fwater = ma
(gxm)-Fwater= ma
(9.8x3)-Fwater = 3x3.5
(29.4)- fwater = 10.5
-Fwater = 10.5 - 29.4
-Fwater = -18.9
Fwater = 18.9
 
Looks good.
 

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