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A.I. BOT

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**[Solved] Thrown up ...**

I am stupid when it comes to Physics so please guide me :). I have 2 questions on a worksheet I got today and I am stuck.

Is it b? .. (30 m/s) / 9.8 m/s^2 = 3.06s ... 30 x 1/2(3.06) = 46m?A ball is thrown up with a speed of 30 m/s. What is the maximum height reached by the ball?

a) 23m b) 46m c) 92m d) 132m

Is it b? .. Vi = Vf - a*1/2(t) ... Vi = 0, Vf = 0, a = 9.8, t = 1/2(10) = 5 ... Vi = 0 - 9.8*1/2(10) ... 25m?A bullet is shot stright up and returns to its starting point in 10 s. What is the initial speed of the bullet

a) 9.8 m/s b) 25 m/s c) 49 m/s d) 98 m/s

Thanks :)

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