Vo = 30m/s[90o]?.
a. Vo*t + 0.5g*t^2 = 20 m.
30*t- 4.9t^2 = 20, -4.9t^2 + 30t - 20 = 0, t = ?. Use Quad. Eq.
b. V^2 = Vo^2 + 2g*h = 0. 30^2 - 19.6h = 0, h = ?.
c. V = 0 at max. ht.
d. V = Vo = 30 m/s.
a boy uses a slingshot to launch a rock with a velocity of 30m/s how long does it take it to reach a height of 20m,what maximum height does the rock reach, what is the velocity of the rock at this height, what is the velocity of the rock just before it lands
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