physics/kinematics?

Question

Ignoring air drag, what is the maximum speed possible for a horizontally moving tennis ball as it clears the net 1.0 m high and strikes within the court's border, 12 m distant?
in meters per second

Answer 1

x(t)=v*t
assume t=0 when the ball clears the net.

Since it is only horizontal
y(t)=1-.5*9.8*t^2
for the ball to just stay in
y(t)=0 when x(t)=12
solve for v
t=sqrt(2/9.8)
v=12/sqrt(2/9.8)
V=26.6 m/s

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