Instruction: Answer ALL questions in the provided answer booklet. 1) FIGURE 1 shows a horizontal force, F pushes a 20 kg box to move it up a smooth inclined plank from position X to position Y. The magnitude of the force F is 200 N. (Given 3 = 9.81 ms'z) 7 FIGURE 1 Find: (i) the potential energy at Y [2 marks] (ii) the work done to move the box [3 marks] 2) Calculate the gravitational force between the sun and earth with their centres 1.50 x 10\" m apart (Given: mass of sun = 1.99 x 103'0 kg; mass ofearth = 5.98 x 102' kg) [2 marks]