QUESTION 1 a) The mass and the diameter of a hemisphere are 1.5 1012 g and 2.5105 cm, respectively. Determine the density of the hemisphere in kg/m. b) Three vectors are shown below: B 56.0 to 28.0 Calculate the magnitude and direction of the resultant vector. Use the method of vector resolution. Assume that the magnitudes of A, B and C are 200 units, 150 units and 100 units, respectively. c) Starting from rest at station A, a KTM commuter train travels a distance of 5 km in 5 minutes. The train uniformly accelerates for the first 90 seconds and uniformly decelerates in the last 20 seconds before coming to rest at station B. The speed of the train is constant for the remaining time. i) Sketch the speed versus time graph for the motion of the train. ii) From the graph, determine the maximum speed, acceleration and deceleration of the train.