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Sentience
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Homework Statement
Two identical stones are dropped from rest and feel no air resistance as they fall. Stone A is dropped from height h, and stone B is dropped from height 2h. If stone A takes time t to reach the ground, stone B will take time:
a. 2t
b. t/2
c. 4t
d. t /(square root of t)
e. 2 * (Square root of t)
Homework Equations
V = Vo + at
X - Xo = Vo*t + .5at^2
V^2 = Vo^2 + 2a(X - Xo)
The Attempt at a Solution
The answer is e, 2 times square root of t. My teacher hinted that I use one of the kinematic equations and solve for 2h using 2t. However, because this is a generic problem, I'm not really sure how to go about it. It's got to be the 1st for the 3rd equation, I'm don't feel like I have enough information. Any advice/hints/answers would be appreciated.
Also, if I have other physics questions about different kinds of problems (say vectors or acceleration) should I just make one thread containing them all or separate threads?