. A baseball is hit so that it travels straight upward after being struck by the bat. A fan observes that it takes 3.00 s for the ball to reach its maximum height. Find (a) the ball’s initial velocity and (b) the height it reaches.

Question

.  A baseball is hit so that it travels straight upward after being struck by the bat.  A fan observes that it takes 3.00 s for the ball to reach its maximum height.  Find (a) the ball’s initial velocity and (b) the height it reaches.

anonymous · Answer

again use the velocity equation
$$v=at+v_o$$
since acceleration of gravity isnt given, im going to use SI units and go with a=-9.81m/s

anonymous · Answer

when the ball reaches peak height the velocity will be equal to?

anonymous · Answer

any ideas? @tom0108

anonymous · Answer

29.43 m/s

anonymous · Answer

yes velocity at peak would be 0 m/s 
so now that you have the initial velocity
substitute into the position equation
$$x=\frac{1}{2}at^2+v_ot+x_o$$
and solve for the height when t= 3