Uniform acceleration

  • Thread starter davon806
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  • #1
davon806
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Homework Statement


Help please,I have no idea...This is the last question of my hw

A boy stands at the edge of a cliff which is 30m above the ground and throws a ball vertically upwards.It hits the ground 3.0s later.Find the initial velocity of the ball.


Homework Equations





The Attempt at a Solution

 

Answers and Replies

  • #2
lewando
Homework Helper
Gold Member
1,367
144
Can you think of any kinematic (constant acceleration) equations that might apply?
 

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