If they start from rest, determine their speed when $\backslash ($ t$=5\backslash$mathrm$\{$~s$\}\backslash ).$

Crates $\backslash ($ A $\backslash )$ and $\backslash ($ B $\backslash )$ weigh $100$ lb and $50$ lb $,$ respectively. The coefficient of kinetic friction between the crates and the ground is $\backslash (\backslash$mu$\_\{$k$\}=0\mathrm{.}25\backslash ).($Figure $1)$

Figure

Express your answer to three significant figures and include the appropriate units.

Request Answer

Part B

Also, find the force exerted by crate $\backslash ($ A $\backslash )$ on crate $\backslash ($ B $\backslash )$ during the motion.

Express your answer to three significant figures and include the appropriate units.