Doc Al, I am trying to solve it but the problem isn't that I don't know how to calculate things. I don't know how to find out the Force since I don't know how much air res. that works.
To find the acceleration I need to know the Force, but that's where the problem comes. I can chose to go two...
Doc Al can please solve that question (B).
I've now tried 1-2 hrs, I just get 303 N.
Actually the problem lays in the air resistance. It says it has a total air res. of 1000 N, but only 2/3 of this works on the car. So one of my mates said the trick of this question was that 2/3 had nothing...
No, we have about Newton laws and FORCE IN N (Newton) and not watt or joule.
Yeah I know but yet I came to the answer that I compared with my classmates and they've the same!
But actually the question I am my knees to get answer on is B :( I am very confused, many have got different answers.
Sorry I am not from an English-speaking country so I'll try to translate the words correctly. But..
On A)i:
F = mass * acceleration
F/mass = acceleration
1700N / 500kg+1200kg = acceleration
1700N / 1700KG = 1 m/s^2
On A )ii:
I don't know what I am doing but this seems to be ok...
Diane_ sorry my fault. I've edited my post and at the bottom you'll se what answers I got. But in my next post I'll try to cover how I found that answer. Just wait couple of minutes.
A car drags a trailer like the illustration below shows. http://home.no/elgskogskole/mycar.JPG
a)The speed is so low that the friction has nothing to do with the movement of the car.
i)What is the acceleration when the tires are dragging the car with the power of 1700 N.
ii)What is the...