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1. I would really appreciate it if somebody would help me finish the M2 projectiles chapter.
https://6caf30cbcaf0c74dfdacf3d63c55...EZJY1U/CH1.pdf
So the first Question- (just to get started)...
Exercise B Q 10.- Did they make a mistake in part C? (they also give roots of velocity eqn below answer). I think they made a huge mistake :/
Thanks!
2. Do it yourself

Show your working and proof of what youve done
3. (Original post by schindlers list)
Do it yourself

Show your working and proof of what youve done
omg I have. I did not get the answer of 42 which it is supposed to be.
Integral of velocity eqn is
I put in values for 4 and the root and then the integral from the root to 3. I got a really small answer... :/
If you look at the solution bank it gives incorrect roots (geogebra agrees) and in reality the velocity does change sign...
The question asks for distance travelled in the interval [3,4] - so it means you mod the negative integral value (for 1 of the integrals). Correct me if I'm wrong.
4. bump
5. (Original post by MathMeister)
omg I have. I did not get the answer of 42 which it is supposed to be.
Integral of velocity eqn is
I put in values for 4 and the root and then the integral from the root to 3. I got a really small answer... :/
If you look at the solution bank it gives incorrect roots (geogebra agrees) and in reality the velocity does change sign...
The question asks for distance travelled in the interval [3,4] - so it means you mod the negative integral value (for 1 of the integrals). Correct me if I'm wrong.
No

Show the working so lying
6. (Original post by schindlers list)
No
Show the working so lying
I have kind of given lots of info/ working./proof I just wanna know if they are wrong or not! I cannot find that out :/
7. bump... come on guys/gals
8. (Original post by MathMeister)
bump... come on guys/gals
I was trolling

I dont know none of these lol
9. (Original post by schindlers list)
I was trolling shodd of then off yeh pop
I dont know none of these lol
ha yah I know
twas why i was asking others lol
10. (Original post by MathMeister)
ha yah I know
twas why i was asking others lol
It does seem like they've made a mistake.

11. (Original post by ThatPerson)
It does seem like they've made a mistake.

I do not know how to do it. Plz may somebody help me get the correct answer?
12. (Original post by ThatPerson)
It does seem like they've made a mistake.

Is the answer the integral of the velocity eqn from 4 to the root where v changes sign. plus the mod of the integral from the root to 3?
I got 2.256902162 metres ???
13. (Original post by MathMeister)
Is the answer the integral of the velocity eqn from 4 to the root where v changes sign. plus the mod of the integral from the root to 3?
I got 2.256902162 metres ???
I can't quite follow what you've written there but I believe the correct answer is 2.26m.
14. (Original post by ThatPerson)
I can't quite follow what you've written there but I believe the correct answer is 2.26m.
Ahhh ok Thanks I surely got it right then- our method then is correct
15. (Original post by ThatPerson)
I can't quite follow what you've written there but I believe the correct answer is 2.26m.
still doesnt solve why one of my quadratics in another question ended in an imaginary number for T lol
Correct eqn and everything cus it worked when changed into linear eqn haha

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