help /sci/! I know the car's mass and the engine's

>>8290008
Oh and this is all neglecting friction, air resistance, etc... and car's on a flat surface so gravity not a factor.

>>8290008
Go to your instructor not us

we are not pre-college homework help

>>8290008

the car would have a power train with really complex mechanical properties

>>8290008
v would be proportional that the mass has to horse power

So m >= hp/f or the car wouldn't run

>>8290029
Sure, then take the "200 hp" number as the power delivered to the wheels. And this:
>neglecting friction, air resistance, etc
means that it's all converted to acceleration.

>>8290048
what?

>>8290025
Not homework. Most "pre-college" teachers don't draw homework problems in MS Paint. And normal people call it "high school," numbnuts.

>>8290073

a real car it would shift gears. Good luck figuring that shit out

>>8290077
Some people, when they want quick answers, will redraw something in MS paint because it only takes like 30 seconds
compared to the relative 5 minutes they could spend looking for an answer

boump

>>8290073
Did you pay Elon the $10k upgrade for "ludicrous speed?"

There are a lot of variables you are omitting here, anon.

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>>8290048
>>8290085
>>8290190
>/sci/ takes on a middle-school-level dimensional analysis problem

In a real (not ideal) car, power (P) is a
complicated function of the car's velocity (v)
involving the engine's power curve and
the drivetrain gearing.
The accelerating force (F) is always
limited by the friction co-efficient (f)
of the tyres, so that F ≤ Nf,
where N is the normal force (weight)
on the drive wheels.

>>8290323
Ok, so throw out the friction and assume the power is constant and no gears. 200 hp straight to the wheels. What's the force?

>>8290334
6

>>8290008
I don't know why you're getting dicked around here.

Consider P=Wt, and use the work energy theorem to note that
W=Delta-E (gonna use E for kinetic energy here).

Then recall that E=1/2(m v^2).

So if power is constant, energy is increasing linearly with time and so velocity is increasing linearly with time.

Additionally, with P*t = 1/2 mv^2 we get

v = Sqrt(2*P*t/m)

Acceleration can then be found through differentiation.

Acceleration isn't constant though, which is the error that's caused you so much difficulty.

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>>8290353
Why the fuck does this fucking retarded site think this is spam?

>>8290353
Ayyyyy thanks.
And then I can find F through F = ma.

>I don't know why you're getting dicked around here.
Welcome to 4chan

>>8290353
>velocity is increasing linearly with time
>v = Sqrt(2*P*t/m)
wat

>>8290406
You can do LaTex directly in the post with tags.

[math]\Delta E = \frac{m \left ({v_f}^2 - {v_i}^2 \right )}{2}[/math]

>>8290416
What exactly did you think the text in my post meant?

>>8290008

man what's with those units

Americans are fucking retarded

200hp wtf? that's like medieval shit

>>8290412
Yeah, my bad. That was stupid.

>>8290486
It's not part of any normal American curriculum.