Express Max height in terms of g and T? ?

[scke0803]

Express Max height in terms of g and T?!?

I need to express the y_max in terms of g and T...

do i need to put in my V_0y value? or leave it as a variable?









i've tried V_0y*T + 1/2gT^2

 

[ehild]

Vo is not a variable, it is constant. Your formula is correct for the height at time T. You have to find the time when the body reaches it maximum height and does not rise any more. What is its velocity at that instant?

ehild

 

[scke0803]

Velocity at maximum height is 4.229 m/s

 

[ehild]

So it moves further upward. Why is it maximum height then?
Try to throw up something and watch the velocity.

And mind the signs. There is a maximum height if Vo points upward (and g downward) . Vo and g have to be of opposite signs. ehild