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Home Q & A Board Science-Related Homework Help Physics
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ff151djg ff151djg
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10 years ago
(a) What is the projectile's initial speed?
(b) What is its maximum altitude?
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#1
10 years ago
Neglecting air resistance, the time to peak altitude is the same as the time from peak altitude.  Therefore the time to peak altitude is 6 seconds.  Peak altitude occurs when the projectile's vertical velocity slows to a stop just before falling at acceleration g.  
We can write:
Vy(6) = 0 = Vyo -9.8*6 => Vyo = 58.8m/s
Vyo = Vo*sin35 => Vo = 102.5 at 35 degrees. a) Leftwards Arrow---------------------
Now that we have Vyo, we can calculate the peak altitude h
h = 58.8*6 - 4.9*36 = 176.4m b) Leftwards Arrow----------------------------
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