# The projectile motion question (1 Viewer)

#### shinji

##### Is in A State Of Trance
what was ur answer for the range and max height?

i let gravity = 10ms^-2 [i wrote tht down]. would i get marked down?

Max Height : 80m
Range : 360m

i used 3u method~~ lol

#### RingerINC

##### BBoy OG Loc Gangsta
shinji said:
what was ur answer for the range and max height?

i let gravity = 10ms^-2 [i wrote tht down]. would i get marked down?

Max Height : 80m
Range : 360m

i used 3u method~~ lol
about right answers, but rounded because of the 10 thing.

Also it says 9.8 in the data sheet, so yes, they will mark you down somewhat.

#### suzieee

##### Member
mine was something like that... i dont know if i did it rigth tho cos my teacher explained how to do projectile motion to me on the phone yesterday and i didnt get it.
I have no idea what method i used, i just drew a right angled triangle and subbed things into the formulas

#### shinji

##### Is in A State Of Trance
RingerINC said:
about right answers, but rounded because of the 10 thing.

Also it says 9.8 in the data sheet, so yes, they will mark you down somewhat.
*tears*

friend said tht his teacher [hsc marker] said they won't mark u down? :S

#### sja

##### dingleberry
why did half my year get 108.3 as the maximum height

#### gamecw

##### Member
1.45m/s
2.60m/s
3.80m
4.300+m

sumthin close to that

#### Benmc

##### Member
Maximum height was around 69 metres or something.
The range was when T = 8 seconds or something and ended up being something around 300m. Wow...i remember none of it.

#### typical_azn

##### New Member
u could just recalculate it with those figures 45m/s vertical and 60m/s horizontal, but a quick answer would be sumthing like gamecw's

#### shinji

##### Is in A State Of Trance
range = 8 seconds.
and then u calculated it by multiplying 45 x 8 = 360m

hence, range = 360m?

#### gamecw

##### Member
shinji said:
range = 8 seconds.
and then u calculated it by multiplying 45 x 8 = 360m

hence, range = 360m?
yep

#### ~shinigami~

##### ~Summer Song~
I got:

a) 45ms-1

b) 60.2ms-1

c) max height = 81.6m

d) Range = 367.2m

#### xxPanDa

##### Member
~shinigami~ said:
I got:

a) 45ms-1

b) 60.2ms-1

c) max height = 81.6m

d) Range = 367.2m
same, i forogt wah i got for c

hey shinji we have 3 more exams! XD

#### hyparzero

##### BOS Male Prostitute
Um. wasn't the question asking: what is the horizontal velocity when it lands?
shouldnt that be ZERO?

#### typical_azn

##### New Member
its constant velocity because its horizontal, refer to newtons laws, so should be the same, i dont think it said anything about resistance or friction.

#### ~shinigami~

##### ~Summer Song~
I just used the fact that Ux = Vx = constant

#### P_Dilemma

##### Extraordinary Entertainer
~shinigami~ said:
I got:

a) 45ms-1

b) 60.2ms-1

c) max height = 81.6m

d) Range = 367.2m
BOOYEAH! Same answers as me! Let's shake!

-P_D

#### ~shinigami~

##### ~Summer Song~
P_Dilemma said:
BOOYEAH! Same answers as me! Let's shake!

-P_D
Yay. Hope you and everyone else did well in all the other questions too.

Oh yeah and I'm not doing the HSC this year, I just did the projectile motion question for fun when the teacher showed us the exam paper.

#### kobz

##### Member
~shinigami~ said:
I got:

a) 45ms-1

b) 60.2ms-1

c) max height = 81.6m

d) Range = 367.2m
thats wat i had aswell, therefore that must be correct

though the range = 367.3 m to be more exact lol

#### therz_danger

##### New Member
xxPanDa said:
same, i forogt wah i got for c

hey shinji we have 3 more exams! XD
OMG SAME HERE, THATS WAT I GOT TOOO HAHA IM SO HAPPY!!!

#### shinji

##### Is in A State Of Trance
xxPanDa said:
same, i forogt wah i got for c

hey shinji we have 3 more exams! XD
yeah wOot! =D

=]