## Question:

A block of weight W slides down an inclined plane of angle θ with initial velocity ${ v }_{ 0 }$ . Determine the velocity of the block at time t1 if the coefficient of kinetic friction between the block and the plane is μk. Given: W = 20 lb , ${ t }_{ 1 }$ = 3 s , θ = 30 deg , ${ μ }_{ k }$ = 0.25 , ${ v }_{ 0 }$ = 2 ft s , g = ${ 32.2ft/s }^{ 2 }$