What is the Takeoff and Horizontal Speed?
A gray kangaroo can bound across a flat stretch of ground with each jump carrying it 9.0 m from the takeoff point.
If the kangaroo leaves the ground at a 20° angle, what is its takeoff speed ?
R (range) = v02 sin2(θ) / g
9.0 m = v02 sin2(20) / 9.81
v0 = 11.7 m/s (takeoff speed)
= 12 m/s
What is its horizontal speed?
Vx =v0 cos(20)