A heavy object is dropped from a vertical height of 8.0 m. What is its speed when it hits the ground?

Question

Physics

Mira Mclaughlin

7 August, 10:14

A heavy object is dropped from a vertical height of 8.0 m. What is its speed when it hits the ground?

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Answers (1)

Know the Answer?

David Sexton · Answer 1

What do you know:

d=-8.0mm (starts higher and ends lower so it is negative)

Vi=0m/s (because it was dropped, not thrown)

A=-9.8m/s^2 (gravity)

Vf=?

Use the equation:

Vf^2=Vi^2+2A (d)

Vf^2=2 (-9.8) (-8.0)

Vf^2 = 156.8 - - >find the square root of this

Final answer: Vf = 12.5m/s