A pebble is dropped from rest into a deep well

PHYSICS · Subjective · A Level · Physics · Mechanics and materials · Mechanics and materials

Problem

A pebble is dropped from rest into a

19.6\,\text{m}

deep well. If downward is taken as positive, calculate the time it takes to reach the water surface.

g = 9.8\,\text{m/s}^2