## Question:

Block A has weight ${ W }_{ A }$ and block B has weight ${ W }_{ B }$. If B is moving downward with a velocity ${ v }_{ B1 }$ at t = 0, determine the velocity of A when t = ${ t }_{ 1 }$ . The coefficient of kinetic friction between the horizontal plane and block A is ${ μ }_{ k }$ . Given: ${ W }_{ A }$ = 10 lb , ${ W }_{ B }$ = 3 lb , ${ v }_{ B1 }$ = 3 ft/s , ${ μ }_{ k }$= 0.15 , ${ t }_{ 1 }$ = 1 s , g = ${ 32.2ft/s }^{ 2 }$