The rotation of the bar OA around O is defined by the relation Θ= t3 + 4t, where Θ is in radians and t in seconds. Collar B slides along the bar according to r = 2.5t3 + 5t2 , where r is in inches and t is seconds. When Θ= 115 °, determine: a) the velocity of the collar, b) the acceleration of the collar, and c) the radius of collar path curvature.

The rotation of the bar OA around O is defined by the relation Θ= t3 + 4t, where Θ is in radians and t in seconds. Collar B slides along the bar according to r = 2.5t3 + 5t2 , where r is in inches and t is seconds. When Θ= 115 °, determine: a) the velocity of the collar, b) the acceleration of the collar, and c) the radius of collar path curvature.