Question

A kangaroo is capable of jumping to a height of 2.98 m. Determine the takeoff speed of the kangaroo. What should be his take-off speed if he wishes to attain the same height on a planet with gravity of 4.5 m/s2.

Answer 1

a = -9.8 m/s2

vf = 0 m/s

d = 2.62 m

Find:

vi = ??vf2 = vi2 + 2*a*d

(0 m/s)2 = vi2 + 2*(-9.8 m/s2)*(2.62 m)

0 m2/s2 = vi2 - 51.35 m2/s2

51.35 m2/s2 = vi2

vi = 7.17 m/s

Hence,Take Off Speed of Kangaroo is 7.17 m/s.