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A ball falls down from the top of a height of 70m. How much time the ball will take to reach the ground?
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39 votes
39 votes
A ball falls down from the top of a height of 70m.

How much time the ball will take to reach the ground?

A ball falls down from the top of a height of 70m. How much time the ball will take-example-1
User Vhoyer
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2.4k points

1 Answer

13 votes
13 votes
  • Height=h=70m
  • Acceleration due to gravity=g=9.8m/s²
  • Time be t

Apply second equation of kinematics

  • h=1/2gt²
  • gt²=2h
  • 9.8t²=2(70)
  • t²=140/9.8
  • t²=14.3
  • t=3.78s
User Rama Priya
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2.7k points
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