## 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: $latex v_2^2=v_1^2+2a_c\left(s_2-s_1\right)&s=2&fg=000000$ $latex v_2^2=\left(18\right)^2+2\left(32.2\right)\left(50-0\right)&s=2&fg=000000$ $latex v_2=59.532\:ft/s&s=2&fg=000000&bg=8DB600$   $latex v_2=v_1+a_ct&s=2&fg=000000$ $latex 59.532=18+32.2\left(t\right)&s=2&fg=000000$ $latex t=1.29\:s&s=2&fg=000000&bg=8DB600$

The shaft is supported by a smooth thrust bearing at B and a journal bearing at C. Determine the resultant internal loadings acting on the cross section at E. SOLUTION: The free-body diagram is shown below. Solve for Cy by taking moment at point B $latex \sum M_B=0&s=1&fg=000000$ $latex C_y\left(8\right)+400\left(4\right)-800\left(12\right)=0&s=1&fg=000000$ Pass a cutting plane at … Continue reading Problem 1-1|Stress | Mechanics of Materials| Ninth Edition| R.C. Hibbeler|