Title Block C starts from rest and moves down with a constant acceleration. Knowing that after block A has moved 1.5 ft its velocity is 0.6 ft/s, determine (a) the acceleration of A and C, (b) the change in velocity and the change in position of block B after 2.5 seconds.

Block B moves downward with a constant velocity of 20 mm/s. At t = 0, block A is moving upward with a constant acceleration, and its velocity is 30 mm/s. Knowing that at t = 3 s slider block C has moved 57 mm to the right, determine (a) the velocity of slider block C at = 0, (b) the accelerations of A and C, (c) the change in position of block A after 5 s. A B

Car B is initially stationary and is struck by car A moving with initial speed ?1 = 20 mi/hr. The cars become entangled and move together with speed ?′ after the collision. If the time duration of the collision is 0.1 sec, determine (a) the common final speed ?′, (b) the average acceleration of each car during the collision, and (c) the magnitude R of the average force exerted by each car on the other car during the impact. All brakes are released during the collision.