Question

A kangaroo jumps to a vertical height of 2.70 m. How long was it in the air before returning to Earth? ***** Use your velocity initial from above

a 0.74 s
b 1.48 s
c 3.63 s
d 0.00 s

Answer 1

0.74s

Step-by-step explanation:

Given parameters:

Vertical height of Jump = 2.7m

Unknown:

Time of suspension in air = ?

Solution:

To solve this problem, we have to use one of the kinematics equation.

H = ut +
`(1)/(2)` g t²

H is the height

u is the initial velocity

t is the time

g is the acceleration due gravity

U = 0m/s

So;

H =
`(1)/(2)` g t² =
`(1)/(2)` x 9.8 x t²

2.7 = 4.9t²

t² = 0.55

t = 0.74s