projectile motion question (1 Viewer)

asb_92

New Member
Joined
Apr 16, 2009
Messages
29
Gender
Female
HSC
2009
hey guys
was jus wondering could someone please help me with this problemm...
i havnt done projectile in ages and cant seem to work it out ><
thankss in advance :)

"A projectile is fired at an angle of 30* to the horizontal from a tower 20m high. the projectile takes 10s to hit the ground. calculate the initial speed of the projectile."
 

kaz1

et tu
Joined
Mar 6, 2007
Messages
6,960
Location
Vespucci Beach
Gender
Undisclosed
HSC
2009
Uni Grad
2018
s=ut +1/2.a.t2
20=vsin30(10) +4.9(100)

Solve that and you should get it.
 

k02033

Member
Joined
Mar 9, 2006
Messages
239
Location
Parramatta
Gender
Male
HSC
2007
should be Sy=0 when t=10



notice once i subtitude for Sy and t, i have one equation, one unknown ---> solvable





rearrange for Uy







 

Users Who Are Viewing This Thread (Users: 0, Guests: 1)

Top