Question 3: Three masses were connected as shown in the diagram here. The gystem 1s not moving. Determine the tensions in all strings. (1.2, A:2) 15.0 kg ';lj 7.0kg l 13.0kg Question 4: A three-cart locomotives were able to accelerate from rest to 60 km/hr with an engine cart (E) in 5.00 mins. If each train cart (including the engine cart) is of same mass of 1,500 kg and the coefficient of kinetic friction is z, =0.15, determine the force (F) the engine must supply. (I1:2, A:2) Free body diagrams (C) and the labelling of forces (K) are 2 mark each in each question. Question 1: A hockey puck with initial velocity of 20 m/s enters a rough section of ice. The rough ice patch has a kinetic coefficient of friction, x, =0.30. If the velocity of the puck after the rough patch is 10 m/s. Determine the length of this rough patch. (I:1, A:1) Question 2: Consider the mass-pulley system shown here. The table has a static friction coefficient of x4 =0.52, while a kinetic fiction coefficient of , =0.31. Assume that the mass M =8.00 kg. Answer the questions below: A. What would the small mass be for the system start to move? (I:1, A:1) B. What would be the acceleration and the tension of the system when the small mass is 6.00 kg? (I:2, A:2) M