A girl throws a rock horizontally, with a velocity of 10 m/s,
from a bridge. It falls 20 m to the water below. a) How long does
it take for the rock to reach the water? b) How far does the rock
travel horizontally before striking the water, assuming negligible
air resistance? c) what is the final horizontal velocity of the
ball ? d)What is the final vertical velocity of the ball? e) the
magnitude of the final velocity of...