Does Diving into Water Involve Negative Work?

AI Thread Summary
Diving into water involves negative work due to the resistance exerted by the water against the diver's downward motion. As the diver descends, the water pushes upward, opposing the direction of movement, similar to friction. This resistance results in a scenario where, despite the diver's forward momentum, the work done by the water is classified as negative. The analogy of punching through paper illustrates this concept, where the paper resists the force but is ultimately penetrated. Thus, the water's interaction during a dive can be understood as negative work.
harp AP 2010
Messages
30
Reaction score
0

Homework Statement


If you dive into the water does it do work on you? Positive or negative?


Homework Equations





The Attempt at a Solution


I think I know this one, it is negative work because he is pushed up from resistance, but continues to go down.
 
Physics news on Phys.org
I would say that the water does negative work on you because its working like friction. Even though you are still moving forward the water is pushing on you opposite the direction that you are moving.
 
Its like punching a piece of paper. The paper works on you but you still break through. Relative to the paper, since the fist broke through, work is negative.
 
Thread 'Voltmeter readings for this circuit with switches'

Thread 'Voltmeter readings for this circuit with switches'

TL;DR Summary: I would like to know the voltmeter readings on the two resistors separately in the picture in the following cases , When one of the keys is closed When both of them are opened (Knowing that the battery has negligible internal resistance) My thoughts for the first case , one of them must be 12 volt while the other is 0 The second case we'll I think both voltmeter readings should be 12 volt since they are both parallel to the battery and they involve the key within what the...
View full post »
Thread 'Trying to understand the logic behind adding vectors with an angle between them'

Thread 'Trying to understand the logic behind adding vectors with an angle between them'

My initial calculation was to subtract V1 from V2 to show that from the perspective of the second aircraft the first one is -300km/h. So i checked with ChatGPT and it said I cant just subtract them because I have an angle between them. So I dont understand the reasoning of it. Like why should a velocity be dependent on an angle? I was thinking about how it would look like if the planes where parallel to each other, and then how it look like if one is turning away and I dont see it. Since...
View full post »

Similar threads

Why does the logic of negative acceleration not always indicate negative work?
Replies
7
Views
2K
Correct statement about siphon used to empty water tank
Replies
10
Views
221
Is the work caused by the force of friction negative?
Replies
13
Views
2K
Why is Work Negative in PV diagram?
Replies
2
Views
5K
Mechanisms Involved When Charging a Battery
Replies
10
Views
1K
About work done through exercise (push ups)
Replies
4
Views
3K
Trouble with negative sign in this Potential Difference problem
Replies
3
Views
2K
How does a simple circuit work?
Replies
12
Views
1K
Negative vs Positive work on an escalator
Replies
8
Views
4K
Confusion over acceleration of gravity as positive/negative
Replies
10
Views
1K

Hot Threads

Recent Insights

Back
Top