Course: PHYSICS/FIZIK

Code: SBPH1103

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

QUESTION 2 a] A student constructs a simple pendulum by tying a hub of mass 5D g to the end of a 1 m long string. When the pendulum is in the position shown in Figure 2, the hub is released from rest. Neglect air resistance. Figure 2 i. Calculate the total mechanical ene rgy of the pendulum hols at point A. ii. Find the speed of the hub when it reaches point B, the lowest point in the arc using energyr methods. iii. Calculate the height of the hub above the lowest point when its speed is 11.55 mfs using energy methods. iv. Does the mass and length used affect the maximum height that can be attained by the hob above the lowest point ? Explain. [10 marks} b) Three forces act on a 1 kg object shown in Figure 3. As a result, it accelerates at 10.0 m/s in the direction shown. The magnitudes of of F2 and F3 are 5 N and 8 N, respectively. Determine the magnitude of F1. Explain your reasoning carefully. F2 a = 10.0 m/s2 1.00 kg F WT Figure 3