Problem $2$:

During an engine test on the ground, a propeller thrust $T=3000N$ is generated on the $1800-kg$ airplane with mass center at $G.$ The main wheels at $B$ are locked and do not skid; the small tail wheel at A has no brake. Compute the percent change $n$ in the normal forces at A and $B$ as compared with their "engine$-$off" values.

$N_B=14720N$

$N_A=2940N$

$N_A^{\text{'}}=1983N$

$N_B^{\text{'}}=15,050N$