Two students are on a balcony a distance h above the street. one student throws

Question

Two students are on a balcony a distance h above the street. one student throws a ball vertically downward at a speed vi; at the same time, the other student throws a ball vertically upward at the same speed. Answer in terms of vi, g,h, t. a) what is the time interval between when the first ball strikes the ground and the second ball strikes the ground. b) find the velocity of each ball as it strikes the ground. c) how far apart are the balls at a time t after they are thrown and before they strike the ground.

Is it safe to assume the speed doesn't increase or decrease after being thrown? So really all I'm doing is taking in account the distance traveled since the ball thrown up has twice the distance to travel than the ball thrown down. Would distance alter the velocity when each ball hits the ground? Thanks for your help, it's difficult to predict the pictures and what the balls are doing

Explanation / Answer

so velocity of down ward thrown ball=vvi+2gh velocity of up ward thrown ball=-vvi+2gh velocity of up ward thrown ball=-vvi+2gh c) how far apart are the balls at a time t after they are thrown and before they strike the ground. as the numerical value is not specified we have to derive a general equation
Is it safe to assume the speed doesn't increase or decrease after being thrown? no
So really all I'm doing is taking in account the distance traveled since the ball thrown up has twice the distance to travel than the ball thrown down. Would distance alter the velocity when each ball hits the ground? Thanks for your help, it's difficult to predict the pictures and what the balls are doing no (as per the magnitude)

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