Determine the backspin which should be given to the 20-lb ball so that when its center is given an initial horizontal velocity v G

Determine the backspin ω which should be given to the 20-lb ball so that when its center is given an initial horizontal velocity v_G = 20 ft/s it stops spinning and translating at the same instant. The coefficient of kinetic friction is μ_A = 0.3.

0.5 ft G A VG = 20 ft/s