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/sci/ - Science & Math

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5996557 No.5996557 [Reply] [Original]

/sci/, I come to you because I am retarded and decided to take physics based calculus.

Can someone help me with this problem?

"Two cars start from rest at a red stop light. When the light turns green, both cars accelerate forward. The blue car accelerates uniformly at a rate of 4 m/s2 for 4.9 seconds. It then continues at a constant speed for 11 seconds, before applying the brakes such that the car’s speed decreases uniformly coming to rest 295.79 meters from where it started. The yellow car accelerates uniformly for the entire distance, finally catching the blue car just as the blue car comes to a stop."

"How fast is the blue car going 9.7 seconds after it starts?"

What is the answer?
>pic related: how I feel about this

>> No.5996561

>>5996557

Is the car really blue, or are you colorblind?

>> No.5996564
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5996564

>tfw starting calculus based physics 1 this semester

>> No.5996567
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5996567

Someone has got to know this because it's calculus based with derivatives

>> No.5996570

Shits hard man makes my head hurt

>> No.5996572
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5996572

I just don't know what to do with the constant acceleration for 11 seconds compared to uniform acceleration.

>> No.5996578
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5996578

There's a list of these questions too
>fuck

>> No.5996584
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5996584

Anyone? Please?

>> No.5996594
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5996594

Well I guess physics is not gonna be my class

>> No.5996630

Smartphysics eh. I'm a TA for a course that just assigned that very problem. If you can't do that problem you better just drop now. It's not really a problem that needs calculus, it's just kinematic equations.

>> No.5996651

>>5996630

technically, it does require calculus. you must be a shit TA

>> No.5996663

>>5996651
If you are incapable of memorizing the kinematic equations, sure.

>> No.5996667
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5996667

129 meters fag

>> No.5996688

Let me sum up every freshman physics question ever

<span class="math">\frac{d^2s}{dt^2} = \frac{dv}{dt} = a[/spoiler]

>> No.5996692

>>5996572
All it means is that its acceleration is constant through out the entire 295.79 meters

use the equations of motion to solve this it is actually a really easy problem

>> No.5996697

>>5996572
To add to my statement >>5996692
The Uniformly accelerating yellow car has constant acceleration while the blue car for 11 seconds has constant VELOCITY

>> No.5996702

>>5996651
Are you retarded? This is basic kinematics. This is what they teach before they get into Calculus. Funny thing is that this doesn't even need kinematics, all you need to know is acceleration, velocity and distance considerations. You can do this by intervals of where they are acceleration, not too fucking hard. Very fucking basic.
>>5996557
OP this problem is fucking basic.
4 m/s^2 for 4.9 seconds
4*4.9=19.6 m/s
P.S you're done, and you are welcome dipshit.
Not too bad is it?

>> No.5996705

>>5996702
don't get your panties in a bunch

>> No.5996723

>>5996557
Your university is weird. Everywhere I've ever been it was Calculus based Physics not Physics based Calculus.

Is your school even accredited?