1- (a) Derive an alternative set of SI units for pressure that is equivalent to Nlm 2. (3) (b)The gure below shows the displacements versus time t graph for an object moving along a straight line. (i) Discuss the motion of the object. (ii) Estimate the displacement of the object in 10 5. (iii) Sketch the velocity versus time graph for the motion of the object. ( 10 ) (c)Three forces, each of magnitude F= 100 N F, act on a body of mass m = 10 kg as shown below. What is the magnitude and direction of the acceleration produced? F 1 350 903 \"I (7) 2. (a) Albert has set up a simple pendulum experiment in a special environment where air resistance is negligible. He ties a bob of mass 50 g to a string that is 1 m in length. A sketch of his experiment is shown below with point A being the initial position of the bob and point B being the lowest point in the arc. Albert then releases the bob from point A. (i) What is the kinetic energy of the bob at point B? :ffiexamoumedu.myfexamlessayhlml.php 8110 '23. 2:20 PM Open University Malaysia (ii) Calculate the maximum height that the bob will reach above point B using energy methods. (iii) Albert is convinced that both the mass and the length of the string used will affect the maximum height that the bob will attain above point B. Do you agree? Explain. (12) (b)The work done by a force acting on an object is shown below. Determine the total work done when the object has travelled a distance of 20 m. Assuming that you know the mass of the object, explain how you would be able to determine the speed of the object after 20 m. i 8) ( Total I Juml'ah: 20 )