# Rectilinear Kinematics: Continuous Motion| Engineering Mechanics| Dynamics| RC Hibbeler| Problem 12.1

#### A baseball is thrown downward from a 50-ft tower with an initial speed of Determine the speed at which it hits the ground and the time of travel.

SOLUTION:

$v_2^2=v_1^2+2a_c\left(s_2-s_1\right)$

$v_2^2=\left(18\right)^2+2\left(32.2\right)\left(50-0\right)$

$v_2=59.532\:ft/s$

$v_2=v_1+a_ct$

$59.532=18+32.2\left(t\right)$

$t=1.29\:s$