Iqra N.

asked • 10/20/17

Rock thrown vertically down. Find the time taken

A girl on a bridge throws a rock straight down at -12.5 m/s. It hits the ground 38.4 m below.
How much time did it take ?

1 Expert Answer


Arturo O. answered • 10/20/17

5.0 (66)

Experienced Physics Teacher for Physics Tutoring

Iqra N.

Thank you very much for the solution, but the answer given is 1.08 s.


Arturo O.

Solve the quadratic equation and see that 1.80 is the correct solution, rounded to 2 decimal places.  I suspect that 1.08 is a typo.  Where did that number come from?


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