Question

Kangaroo can jump 2.5 metre vertically what must be the initial velocity of the kangaroo

Answer 1

Using third equation of motion,
v^2 = u^2 + 2as
v is equal to zero since velocity at highest point = 0

0 = u^2 + 2 ( - 9.8 ) × 2.5
0 = u^2 - 49
u^2 = 49
u = √49
u = 7 m/sec

ANSWER = 7 m/sec


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Answer 2

h=2.5m v=0
v²-u²=2gh
-u²=2*-10*2.5
u=√50m/sec