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## Homework Statement

A ball is thrown vertically upward from the ground with an initial velocity of 30 m/s. Assume the acceleration due to gravity is g = 10 m s-2.

How long will it take for the ball to rise to the highest point on its trajectory? (AF:no decimals)

i got v1 = 30m/s

a= 10m/s2

x1=0

but i cant think of where to start given this information can someone point me in the right direction