In the design of a timing mechanism, the motion of pin P in the fixed circular slot is controlled by the guide A, which is being elevated by its lead screw. Guide A starts from rest with pin P at the lowest point in the circular slot, and accelerates upward at a constant rate until it reaches a speed of 90 mm/s at the halfway point of its vertical displacement. The guide then decelerates at a constant rate and comes to a stop with pin Pat the uppermost point in the circular slot. Determine the n- and t-components of acceleration of pin Ponce the pin has traveled 25° around the slot from the starting position. Answers: an = 22 at = tel 220 mm P A mm/s² mm/s²

In the design of a timing mechanism, the motion of pin P in the fixed circular slot is controlled by the guide A, which is being elevated by its lead screw. Guide A starts from rest with pin P at the lowest point in the circular slot, and accelerates upward at a constant rate until it reaches a speed of 90 mm/s at the halfway point of its vertical displacement. The guide then decelerates at a constant rate and comes to a stop with pin Pat the uppermost point in the circular slot. Determine the n- and t-components of acceleration of pin Ponce the pin has traveled 25° around the slot from the starting position. Answers: an = 22 at = tel 220 mm P A mm/s² mm/s²