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New Horizons » General Discussions » Education » AS Physics

AS Physics

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1AS Physics Empty AS Physics Wed Mar 10, 2010 5:27 pm

The Banker

The Banker
NH Member
NH Member

Ahmed, ur da physics guy.. i need help.. and fast :S

One record suggests that the maximum horizontal distance an arrow has been shot on level ground is 889 m. Assuming that the arrow was shot at 45°, at what speed was it launched?

i got 93.4 m/s
it looks wrong man slanty

2AS Physics Empty Re: AS Physics Wed Mar 10, 2010 5:30 pm

preid1220

preid1220
NH Moderator
NH Moderator

lots of uncounted for variables there^

3AS Physics Empty Re: AS Physics Wed Mar 10, 2010 5:31 pm

The Banker

The Banker
NH Member
NH Member

yah, air resistance is menna be neglected slanty

4AS Physics Empty Re: AS Physics Wed Mar 10, 2010 7:43 pm

Ahmed

Ahmed
NH Admin
NH Admin

Shouldn't they give you an initial velocity?

5AS Physics Empty Re: AS Physics Wed Mar 10, 2010 7:44 pm

The Banker

The Banker
NH Member
NH Member

thats what the question wants...

6AS Physics Empty Re: AS Physics Wed Mar 10, 2010 7:46 pm

Ahmed

Ahmed
NH Admin
NH Admin

Oh! Ok shouldn't they give the Vx (initial horizontal velocity)?

7AS Physics Empty Re: AS Physics Wed Mar 10, 2010 7:51 pm

The Banker

The Banker
NH Member
NH Member

i used the equation that goes:

R=(U^2Sin2Ѳ)/g

[R is the range by the way]

8AS Physics Empty Re: AS Physics Wed Mar 10, 2010 7:52 pm

Ahmed

Ahmed
NH Admin
NH Admin

What's "U"?

9AS Physics Empty Re: AS Physics Wed Mar 10, 2010 7:57 pm

The Banker

The Banker
NH Member
NH Member

U is initial velocity...

10AS Physics Empty Re: AS Physics Wed Mar 10, 2010 8:05 pm

Ahmed

Ahmed
NH Admin
NH Admin

R=(U^2Sin2Ѳ)/g


Last question:

Are you sure there is a 2 in front of the theta (Ѳ)?

You actually need to use the double-angle formula? Surprised

11AS Physics Empty Re: AS Physics Wed Mar 10, 2010 8:09 pm

The Banker

The Banker
NH Member
NH Member

yah coz Sin2Ѳ = 2SinѲCosѲ

12AS Physics Empty Re: AS Physics Wed Mar 10, 2010 8:11 pm

Ahmed

Ahmed
NH Admin
NH Admin

Yeah I know...

Never saw that physics formula. But if its correct then plug in everything, and that gives you your answer...need help?

13AS Physics Empty Re: AS Physics Wed Mar 10, 2010 8:17 pm

The Banker

The Banker
NH Member
NH Member

nah i already did it..
just doesn't look right slanty

14AS Physics Empty Re: AS Physics Wed Mar 10, 2010 8:25 pm

Ahmed

Ahmed
NH Admin
NH Admin

Isn't this HW?

15AS Physics Empty Re: AS Physics Wed Mar 10, 2010 8:27 pm

The Banker

The Banker
NH Member
NH Member

emm yah

16AS Physics Empty Re: AS Physics Wed Mar 10, 2010 8:30 pm

Ahmed

Ahmed
NH Admin
NH Admin

*shurg*

Why are you caring that much lol? Ask him tomorrow.

17AS Physics Empty Re: AS Physics Wed Mar 10, 2010 8:31 pm

The Banker

The Banker
NH Member
NH Member

coz i don't like failing life Razz
and how do u know he's a he not a she? Hilarious

18AS Physics Empty Re: AS Physics Wed Mar 10, 2010 8:34 pm

Ahmed

Ahmed
NH Admin
NH Admin

A physics Q isn't your life man Hilarious

Umm...men rule!

19AS Physics Empty Re: AS Physics Wed Mar 10, 2010 8:36 pm

The Banker

The Banker
NH Member
NH Member

i don't like failing in general...
watch how i go all emo after i get my results tomoz... :S
===
and so true.. men do rule Hilarious

20AS Physics Empty Re: AS Physics Wed Mar 10, 2010 8:37 pm

Ahmed

Ahmed
NH Admin
NH Admin

How in the world could you fail HW Hilarious ????

Yup Very Happy

21AS Physics Empty Re: AS Physics Wed Mar 10, 2010 8:39 pm

The Banker

The Banker
NH Member
NH Member

by getting it all wrong Razz

22AS Physics Empty Re: AS Physics Wed Mar 10, 2010 8:58 pm

Ahmed

Ahmed
NH Admin
NH Admin

So??

HW is not even graded lol.

23AS Physics Empty Re: AS Physics Thu Mar 11, 2010 6:37 pm

The Banker

The Banker
NH Member
NH Member

Physics was an epic flop Hilarious
i'm resitting...

24AS Physics Empty Re: AS Physics Thu Mar 11, 2010 7:56 pm

Ahmed

Ahmed
NH Admin
NH Admin

Physics is soooooo easy it's not even funny.

25AS Physics Empty Re: AS Physics Thu Mar 11, 2010 7:59 pm

The Banker

The Banker
NH Member
NH Member

only 4 ppl in the year got grades man ( i was one of em Razz) and the rest of the year got Us..
ur on ur own man... slanty

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