Question

Forces & Energy.


EX.1) If there is a rotational kinetic energy being transfered to a disc, can natural forces be applied parallel to its motion to increase the disc's kinetic energy?

EX.2) Energy was applied to lift an object up (1000J), due to gravity the object would lose some of its energy, if gravity on earth was less then 9.8 Would the object gain more energy to do work?

In general, if a system already has energy applied to do work. More force is applied parallel to that "direction" of work would there be more energy outputted then in?

Answer 1

In a normal system on energy source is applied to give an output. If the output was greater then "IN" its because of another energy sources applied to it.Ok, what if ANOTHER force is applied to it? Parallel to it's motion? Is that possibile?

Thanks!

Vision,

Answer 2

Ow yea another example to illustrate my idea.
Hydrogenerators use the force of gravity to generate electricity(Knowing that the main source of this process is the sun).

When the water fall down and gravity for example was "GREATER" only in that point lets say from 9.8 go way up to 30! Electricity generated by 9.8 will obviously be less then 30!

When gravitational force is increased only in that moment! More output is generated.
It all a matter of forces isn't it?

Vision,

Answer 3

Anyone?

Answer 4

Hey there @Visionary01,

A general answer to you're question yes. Forces if parallel to an object I think can do more work.If any kind of energy source is being transfered from a form to another, if another a force is applied parallel to its direction more energy can be transfered.
I asked a similar question way back! And I've found some useful answers so check hem out:


+ I'll invite some experts who helped me out in this question.

http://openstudy.com/study#/updates/4ffc0439e4b00c7a70c4c15a
http://openstudy.com/study#/updates/4ff8aca5e4b058f8b7632b56

This could generally help you're understanding in energy,work,force.
http://openstudy.com/study#/updates/4ff56128e4b01c7be8c85d3a

Now @TuringTest & @Jemurray3 @CarlosGP. Could you guys help me out with this?

I love this question it works in the field im MOST interested in! Forces & Energy!

Good luck,

Answer 5

can u hlp me out in work energy &power.

Answer 6

@Ruchi. I'm not much of an expert but shoot. I'll give it a try!

Answer 7

To be perfectly honest I don't understand the question being asked.

Answer 8

@Jemurray3 Hey Joe,

From what I've understood so far out of the example's is that @Visionary01 is asking:

If there is an object doing work or transferring energy to another system or object, when additional force is applied parallel to that object would it increase the output work/energy? I said yea, it should.

I hope you understood now Joe, + I hope I've answered @Visionary01 question properly based on what I've understood.

Cheers,

Answer 9

What does it mean to apply a force parallel to the object? Do you mean parallel to the direction of motion?

Answer 10

@Jemurray3 , yea.

Answer 11

@Hope99 Thanks!

@Jemurray3 what i was trying to say is... by adding more force into a system or object doing work or transferring energy, would that "FORCE" increase the total output? I believe it does.

Answer 12

I really found out that so far we can harness natural forces as a source of energy, but never understood how! I looked at gravity, it can increase the speed,energy of an object falling down! Looked at friction, a natural consequence of motion that re-directs energy! Amazing!
I found out that force in general is really related to energy and hope anyone else could add to this question! I'll leave it for another day and close it if nothing more is added to it.

@Jemurray3 have you understood what I've ment? do you agree upon it?


Vision,

Answer 13

If anyone else could add something useful to this topic! I'd truly appreciate it!