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Mathematicians And Physicists. Your Help Needed by Nobody: 10:05am On Dec 30, 2017
grin



∆ I no dey frown now angry


Got stuck on a simple question for the past few hours...
Here is the question:

A body travels in a straight line and its speed at any time does not exceed 5m/s. If it accelerates and decelerates uniformly at 2m/s², find the shortest time required to cover a distance of 30m from rest to rest.

cc: WiseandTrue

sad sad sad
Re: Mathematicians And Physicists. Your Help Needed by LionDeLeo: 10:06am On Dec 30, 2017
Have you heard of differential calculus, if yes, apply it to equation of motion, you will get the answer like eating biscuits.
Re: Mathematicians And Physicists. Your Help Needed by Nobody: 10:21am On Dec 30, 2017
LionDeLeo:
Have you heard of differential calculus, if yes, apply it to equation of motion, you will get the answer like eating biscuits.

angry



∆ Apply make I see am now... How differential calculus wan take work here I no know...?? ∆
Re: Mathematicians And Physicists. Your Help Needed by LionDeLeo: 10:39am On Dec 30, 2017
OrestesDante:


angry



∆ Apply make I see am now... How differential calculus wan take work here I no know...?? ∆
Okay, diff calculus would have made it very easy but since you don't know how it comes in, you can as well make a velocity-time graph. Note, the area under a velocity-time graph is the distance.

Or is it just the answer you want? I can simply post the answer if that is what you want though.
Re: Mathematicians And Physicists. Your Help Needed by Nobody: 10:42am On Dec 30, 2017
LionDeLeo:

Okay, diff calculus would have made it very easy but since you don't know how it comes in, you can as well make a velocity-time graph. Note, the area under a velocity-time graph is the distance.

Or is it just the answer you want? I can simply post the answer if that is what you want though.

angry



∆ I know the area is the distance. But have you tried using your pen and paper to see what my question is all about?

Moreover, the topic is under Mechanics and not calculus for now ∆
Re: Mathematicians And Physicists. Your Help Needed by Nobody: 10:45am On Dec 30, 2017
LionDeLeo:

Okay, diff calculus would have made it very easy but since you don't know how it comes in, you can as well make a velocity-time graph. Note, the area under a velocity-time graph is the distance.

Or is it just the answer you want? I can simply post the answer if that is what you want though.

angry



∆ Post the answer and explain how you got it... You can simply work it out snap your working and upload.. Thanks!!! ∆
Re: Mathematicians And Physicists. Your Help Needed by LionDeLeo: 10:47am On Dec 30, 2017
OrestesDante:


angry



∆ I know the area is the distance. But have you tried using your pen and paper to see what my question is all about?

Moreover, the topic is under Mechanics no calculus for now ∆
Calculus simplifies most mathematical problems, especially engineering. Mechanics is in engineering.

Anyway, it takes a minimum of 8.5 sec to cover the said distance.

Both calculus and graph provides same outcomes but calculus gave it in less than 2 minutes, graph takes a longer time.

Calculus is not just studied for studying sake, it is studied because of its application in places like mechanics.
Re: Mathematicians And Physicists. Your Help Needed by Nobody: 10:48am On Dec 30, 2017
LionDeLeo:

Calculus simplifies most mathematical problems, especially engineering. Mechanics is in engineering.

Anyway, it takes a minimum of 8.5 sec to cover the said distance.

Both calculus and graph provides same outcomes but calculus gave it in less than 2 minutes, graph takes a longer time.

Calculus is not just studied for studying sake, it is studied because of its application in places like mechanics.


angry



∆ ok. But using calculus as far as the topic is concerned is considered totally out of question... I'd love to know the Graph method. That's the scope for now ∆
Re: Mathematicians And Physicists. Your Help Needed by LionDeLeo: 10:52am On Dec 30, 2017
OrestesDante:


angry



∆ Post the answer and explain how you got it... You can simply work it out snap your working and upload.. Thanks!!! ∆
Anyway, since you don't seem to know how calculus comes in, let me post the graphical approach here.

But in calculus, you simply differentiate the applicable equation (s=ut +1/2 at^2) with respect to t, then equate to zero to find the minimum value of t.

Brb with the graph.
Re: Mathematicians And Physicists. Your Help Needed by Nobody: 10:55am On Dec 30, 2017
LionDeLeo:

Anyway, since you don't seem to know how calculus comes in, let me post the graphical approach here.

But in calculus, you simply differentiate the applicable equation (s=ut +1/2 at^2) with respect to t, then equate to zero to find the minimum value of t.

Brb with the graph.

angry



∆Alright ∆
Re: Mathematicians And Physicists. Your Help Needed by LionDeLeo: 10:58am On Dec 30, 2017
OrestesDante:


angry



∆Alright ∆

1 Like 1 Share

Re: Mathematicians And Physicists. Your Help Needed by Nobody: 11:02am On Dec 30, 2017
[quote author=LionDeLeo post=63737328][/quote]
cheesy


∆ Ha!! Thanks gotten!!! ∆
Re: Mathematicians And Physicists. Your Help Needed by Nobody: 11:05am On Dec 30, 2017
[quote author=LionDeLeo post=63737328][/quote]
angry


∆ My mistake started here ∆

Re: Mathematicians And Physicists. Your Help Needed by Nobody: 11:05am On Dec 30, 2017
[quote author=LionDeLeo post=63737328][/quote]
angry


∆ My mistake started here ∆

Re: Mathematicians And Physicists. Your Help Needed by LionDeLeo: 11:11am On Dec 30, 2017
OrestesDante:


angry



∆ My mistake started here ∆
So what's my prize? Abi I no win anything? cheesy
Re: Mathematicians And Physicists. Your Help Needed by Nobody: 11:12am On Dec 30, 2017
LionDeLeo:
So what's my prize? Abi I no win anything? cheesy
cheesy


∆ The country is currently tight!!! ∆

1 Like

Re: Mathematicians And Physicists. Your Help Needed by Nobody: 11:12am On Dec 30, 2017
LionDeLeo:
So what's my prize? Abi I no win anything? cheesy
cheesy


∆ The country is currently tight!!! ∆

Re: Mathematicians And Physicists. Your Help Needed by Nobody: 11:22am On Dec 30, 2017
LionDeLeo:

So what's my prize? Abi I no win anything? cheesy


angry



∆ So sad that we are on opposite sides. I don't support Buhari.

What are we going to do now? ∆

1 Like

Re: Mathematicians And Physicists. Your Help Needed by LionDeLeo: 11:53am On Dec 30, 2017
OrestesDante:



angry



∆ So sad that we are on opposite sides. I don't support Buhari.

What are we going to do now? ∆
I don't support anyone, I'm for progress.
Re: Mathematicians And Physicists. Your Help Needed by Nobody: 11:56am On Dec 30, 2017
LionDeLeo:

I don't support anyone, I'm for progress.
angry



∆ Exactly Buhari is not for progress. Thank You!!! ∆

1 Like

Re: Mathematicians And Physicists. Your Help Needed by LionDeLeo: 11:59am On Dec 30, 2017
OrestesDante:

angry



∆ Exactly Buhari is not for progress. Thank You!!! ∆
No pls.

That's the best man for now as far as real progress is concerned, not the "hate" variety.
Re: Mathematicians And Physicists. Your Help Needed by Nobody: 12:12pm On Dec 30, 2017
LionDeLeo:

No pls.

That's the best man for now as far as real progress is concerned, not the "hate" variety.

angry



∆ Don't let me start grin
Re: Mathematicians And Physicists. Your Help Needed by LionDeLeo: 12:16pm On Dec 30, 2017
OrestesDante:


angry



∆ Don't let me start grin
Start or continue? What is it that has not be said of Buhari? Pls continue jare, as you can see, only the intellectuals who know whatsap support the administration of Buhari.

We know exactly what happened, what is happening and why it is happening.
Re: Mathematicians And Physicists. Your Help Needed by Nobody: 12:35pm On Dec 30, 2017
LionDeLeo:

Start or continue? What is it that has not be said of Buhari? Pls continue jare, as you can see, only the intellectuals who know whatsap support the administration of Buhari.

We know exactly what happened, what is happening and why it is happening.

angry



∆ Intellectuals like? ∆
Re: Mathematicians And Physicists. Your Help Needed by LionDeLeo: 12:53pm On Dec 30, 2017
OrestesDante:


angry



∆ Intellectuals like? ∆
The topic of this thread says a lot.
Re: Mathematicians And Physicists. Your Help Needed by Nobody: 1:02pm On Dec 30, 2017
LionDeLeo:
The topic of this thread says a lot.
angry


∆ Alright ∆

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