Course: PHYSICS/FIZIK

Code: SBPH1103

Instructions: Answer all questions.Show your detailed workings clearly and systematically.

QUESTION 1 a) The famous pyramid at Giza that still stands today has a height of 146.7 m and a square base of length 230.6 m. It was made from limestone with a density of 2.8 g/cm . Estimate the weight of the pyramid when it was constructed. (4 marks)b} The speed-time graph of an object is shown below in Figure 1. Does this represent the one-dimensional motion of the object? Justify your answer using your own words. V Figure 1 [3 marks} c) A commuter train travels between two stations, A and B. The train passes station A at a speed of 54 km/h and accelerates at a constant rate for 0.5 km until it reaches a speed of 72 km/h. It then travels at this constant speed for 40 s before decelerating at a constant rate of 1.5 m/s' and coming to rest at station B. Sketch the velocity-time graph of the train's journey between the two stations. Determine the distance between the two stations. (8 marks)