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. A child drops a ball from a window. The ball strikes the ground in 3.0 seconds. What is the. A child drops a ball from a window. The ball strikes the ground in 3.0 seconds. What is the
velocity of the ball the instant before it hits the ground?

Respuesta :

ArnavR

Answer:

30m/s

Explanation:

  • Use formula for height calculation: Time = √2h/√g
  • From here calculate height which comes out to be: 45m(if g is taken 10)
  • Then use formula for velocity calculation: v = √2gh

  • The velocity comes out to be 30m/s

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