Answered

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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

Sagot :

quasarJose

Answer:

0.74s

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  + [tex]\frac{1}{2}[/tex] 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  =  [tex]\frac{1}{2}[/tex] g t²   =  [tex]\frac{1}{2}[/tex]  x 9.8 x t²

      2.7  = 4.9t²  

        t²  = 0.55

       t = 0.74s

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