our exam will be next week.
actually id just like to ask about II.
but im still hoping if there's an angel in disguise that can help with this
please pm me
sorry. just a second year student. TT.TT
here's the problem.
7. A firecracker tossed into the air at 60* with the horizontal at a speed of 30 m/s exploded 15m away. How long was the firecracker in the air before it exploded? How high did it go?
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Waa it's hard. We haven't learned that yet.
Here's one of their answers.
For Altitude:
15/sin60 if the distance is the horizontal distance.
if distance is along the 60 degree then 15sin60
as for how long the firecracker was in the air distance /velocity
15m/30m/s=1/2s
:] Hope it helps.
v=dtsin theta
im forgot already the forumla
Last edited by cydrax_17 (2009-01-26 21:15:18)