The projectile motion question (2 Viewers)

[shinji]

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]

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]

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]

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]

why did half my year get 108.3 as the maximum height

 

[gamecw]

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

sumthin close to that

 

[Benmc]

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]

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]

range = 8 seconds.
and then u calculated it by multiplying 45 x 8 = 360m

hence, range = 360m?

 

[gamecw]

range = 8 seconds.
and then u calculated it by multiplying 45 x 8 = 360m

hence, range = 360m?

yep

 

[~shinigami~]

I got:

a) 45ms^-1

b) 60.2ms^-1

c) max height = 81.6m

d) Range = 367.2m

 

[xxPanDa]

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]

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

 

[typical_azn]

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~]

I just used the fact that U_x = V_x = constant

 

[P_Dilemma]

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~]

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]

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]

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]

same, i forogt wah i got for c

hey shinji we have 3 more exams! XD

yeah wOot! =D

=]