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- Homework Statement
- Suppose you drop a stone from a very tall tower. After the first stone goes down 4 meters, you drop the second stone from the same height. Does the distance between two stones decrease or increase with time?

- Relevant Equations
- Constant acceleration equations for free fall.

I am aware that this question is very simple and basic.

Using ##y(t)=y_0+v_{0,y}t-\frac {1}{2}gt^2## we can find distance as a function of time:

##|y_1-y_2|=|y_0+v_{0,y}t|=-y_0- v_{0,y}t##

I assumed the downward direction to be negative. So as I wrote ##D(t)=-y_0- v_{0,y}t##. It tells that the distance increases linearly with time. But I wanted to describe it to a friend, withhout math.

Can I say that the distance increases because 1st stone had nonzero initial velocity and nonzero initial position? Is this answer enough to get the question's point?

Using ##y(t)=y_0+v_{0,y}t-\frac {1}{2}gt^2## we can find distance as a function of time:

##|y_1-y_2|=|y_0+v_{0,y}t|=-y_0- v_{0,y}t##

I assumed the downward direction to be negative. So as I wrote ##D(t)=-y_0- v_{0,y}t##. It tells that the distance increases linearly with time. But I wanted to describe it to a friend, withhout math.

Can I say that the distance increases because 1st stone had nonzero initial velocity and nonzero initial position? Is this answer enough to get the question's point?

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