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If you are on a boat and you throw out a suitcase, will the level of water increase?
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If you are on a boat and you throw out a suitcase, will the level of water increase?
3,954 Views | (9 votes, avg: 4.33)
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If you are on a boat and you throw out a suitcase, will the level of water increase?
No since the weight of the suitcase was already pushing on the water while it was on
the boat.
The answer is: it depends on the density of the briefcase.
While the briefcase is in the boat, it will displace it’s weight in water.
If the briefcase floats after you toss it out, then it still displaces its weight in water, and there is no change.
However, if the briefcase is heavier than water it will displace its volume, not its weight. The amount of displaced water will be less (which is why it sank) and the water level will decrease.
Above is a great explanation, but I am afraid the answer is wrong.
The question asked, will the water level INCREASE? The answer is NO not “It Depends.”
You had the correct physics, but you didn’t read the question. Under no circumstances will the water level INCREASE. It will either stay the same or Decrease.
Neat observation Otter. Thanks for the answer, Johnhall.
More thoughts:
The water level will decrease during the time when the suit case is in the air being tossed into the water. It will then return to the same level when the suit case goes back into the water.
However, when the suit case impacts the water, depending on how high up you threw it in the air, the water level might increase slightly because of the force of impact of the suitcase, but then it would level out back to the orignial level.
I have a typo in that last post, can someone delete it?
The water level will INCREASE during the time when the suit case is in the air being tossed into the water. It will then return to the same level when the suit case goes back into the water.
However, when the suit case impacts the water, depending on how high up you threw it in the air, the water level might decrease by the amount of water tossed up into the air by the force of impact force of impact of the suitcase, but then it would level out back to the orignial level as long as none of the water spilled out on the shore because of the impact of the “big” suitcase.
The other question is whether or not the suitcase is thrown in the water. If it is thrown on to a dock or land, then the level will decrease due to less weight in the boat.
Well in normal conditions, after throwing the suitcase in the water the water level will be the same as before(when the suitcase was in the boat).
it depends on what material the suitcase is made of(density).
firstly, when the suitcase was onboard the boat, it(suitcase) will displace water equal to its weight.
next, when its thrown into the water it will displace water equal to its(suitcase) volume.
now there are 2 scenarios.
1. suitcase denser than water : volume of water the weight of suitcase will displace will be more than the volume of suitcase. so water level decreases once it is jettisoned.
2. water denser than suitcase : volume of water the weight of suitcase will displace will be less than the volume of suitcase. so water level increases once it is jettisoned.
I think the previous post is slightly incorrect.
The first case is correct i.e the water level should go down if the density of the briefcase is more.
In the second case, the water level should remain the same, as the amount of water displaced would depend on its weight, just as it would if it were in the boat.
I agree with John Hall, but there is one more thing to be noted:
When you THRO the suitcase, the suitcase falls into the water with a velocity thus the pressure at which it hits the water wud momentarily increase the effective weight of the suitcase and so more water will be displaced. So the level of water will increase marginally for a moment of time.
This is an interesting test of knowledge of physics, but isn’t a good test of software development.
No The Water Level Will not increase At all. As Teh water level is already have alterations when you get in the boat. The displacement of water had taken place that time only.
This is analytical section, most of the times it is analysing the way of question only. If the question is straight and unique, the answer is one only. So everybody here is right!
The Question is “If you are on a boat and you throw out a suitcase, will the level of water increase?”
Case 1: When I throw out the suit case and if it fells on bank, the answer is ‘NO’
Case 2: When I throw out the suit case and if it fells in same water, the question will be devided into two sub cases
case 2-1: when the suit case is denser than water, the answer is ‘YES’
case 2-2: when the suit case is lighter than water, the answer is ‘NO’
First, let us ignore the fluctuations due to throwing it (e.g. it could be pushed off a plank). Second, it doesn’t matter if the case lands on water or land. All that matters is that the total weight of the ship is equal to the weight of the water it displaces. The suit case adds weight (unless it is lighter than air), so throwing it out will always cause the level to DECREASE, so NO increase. While it may be tempting to consider its density relative to water, it should really be considered relative to air, since it displaces air in the ship. For example, your water level will increase if you add oil to the ship, which is lighter than water.
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