QUESTION 4 (Start on a new page.) Two trolleys A and B of mass 3,2 kg and 2,6 kg respectively are held at rest on a straight horizontal, frictionless track, with a compressed spring between them, shown in the diagram below. Before the spring is released as B A 3,2 kg 2,6 kg Compressed spring After the trolleys are released, the spring extends to its natural length and then fall onto the track. Trolley A now moves with a constant velocity of 0,4 m-s¹ to the le while trolley B moves with a constant unknown velocity to the right. Trolley B reache the end of the track after 1,3 s. After the spring is released 0,4 m-s¹¹ B A 2,6 kg 3,2 kg Extended spring State the principle of conservation of linear momentum in words. 4.1. 4.2. Calculate the distance travelled by trolley B in 1,3 s. ​