Projectile Motion (1 Viewer)

[kubekoo]

It's a projectile motion from cambridge,

I can do every part, except part a) ii)

the shwing T2 thingy~

thanks heaps!~

 

[wanton-wonton]

I didn't do the question, but I think you need to solve for the two x values for that particular y value which corresponds to T1. Then you play around with that.

 

[kubekoo]

I didn't do the question, but I think you need to solve for the two x values for that particular y value which corresponds to T1. Then you play around with that.

I tried that...... but i got T2=T1 + something, rather than T1/something~ T_T

 

[FinalFantasy]

y=(-1\2)gt²+Utsin@
x=Utcos@

T1=2U\g (sin@-cos@)---->2U\g=T1\(sin@-cos@)

at T2, y=0
0=(-1\2)gt²+Utsin@
(1\2)gt=Usin@
T2=2Usin@\g
=T1sin@\(sin@-cos@)
=T1\cosec@(sin@-cos@)
=T1\(1-cot@)

 

[kubekoo]

y=(-1\2)gt²+Utsin@
x=Utcos@

T1=2U\g (sin@-cos@)---->2U\g=T1\(sin@-cos@)

at T2, y=0
0=(-1\2)gt²+Utsin@
(1\2)gt=Usin@
T2=2Usin@\g
=T1sin@\(sin@-cos@)
=T1\cosec@(sin@-cos@)
=T1\(1-cot@)

Cool, thanks very much, FinalFantasy!
Thansk heaps!