Calculating Buoyant Force on a Boat

AI Thread Summary
The discussion confirms that the resistive force exerted by water on the boat is equal to the engine's force of 7.40x10^5 Newtons, but only if the boat is moving at a constant speed. To calculate the upward buoyant force, the problem can be approached as a mass times gravitational acceleration (mg) calculation. However, there is a concern that insufficient information is provided to fully determine the buoyant force. The conversation emphasizes the importance of understanding the conditions under which these forces apply. Accurate calculations depend on the boat's speed and acceleration.
PhunWithPhysics
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Tell me if I am wrong or not, but you have a boat that weighs 1.70x10^8 kg and the engines are moving it with a forse of 7.40x10^5 Newtons.
a.) I think that the magnitude of the resistive force exerted by the water is equal to the force the boat witch is 7.40x10^5, is this correct?
b.) how do I find the upward buoyant force exerted on the boat?
Any help would be great
 
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yes

yes a is correct

part b is a (mg) problem now just solve for m times g
 
I'm not sure you have enough information for the first part. I believe what you said is true only if the boat is traveling at a constant speed (ie. a = 0).
 
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