Respuesta :

The speed of the cat 5 m from the sidewalk is 7.42 m/s

What is speed:

  • Speed is scalar quantity that refers to how fast an object is moving.
  • Speed can be derived as the rate of change of distance.

The Newton's equation of motion:

  • h = u*t + 1/2 (a*t^2)

here the cat falls from the height,

h = 40 m

since The cat is falling from rest

Initial velocity, u = 0 m/s

acceleration, a = g = 9.8 m/s^2

substituting values in eq.

40 = 0 + ( 9.8 t^2)

t^2 = 40 / 9,8

t^2 = 4.0814

t = 2.02 s

now when cat is 5 m from sidewalk

distance, S = 40 - 5 = 35 m from top

so,

35 = u*2.02 + 1/2 ( 9.8* 2.02^2 )

u = 15 / 2.02

u = 7.4257 m/s

The speed of the cat 5 m from the sidewalk is 7.42 m/s

Learn more about speed of object here:

https://brainly.com/question/18698268

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