# Mock exam paper A Higher Level

 PRE-LEAVING CERTIFICATE EXAMINATION, 2011____________Physics - Higher level____________3 Hour DurationAnswer three questions from Section A and five questions from Section B
 SECTION A (120 marks)Answer three questions from this section. Each question carries 40 marks_____________________________ 1. In an experiment to verify the principle of conservation of momentum, a body A was set in motion with a constant velocity. It was then allowed to collide with a second body B, which was initially at rest. After the collision both bodies moved off together with constant velocity. The following data was recorded during the experiment:Mass of body A = 0.2kg Mass of body B =0.18kg Time taken for A to travel a distance of 20cm before the collision = 0.31sTime taken for A and B to travel a distance of 20cm immediately after collision = 0.57sDraw a diagram of the apparatus which was used in the experiment. (9)Explain how the time was measured. (6)Using the data(a)Calculate the velocity of A (i) before and (ii) after the collision(b) show how the experiment verifies the principle of conservation of momentum (18)How was the effect of friction minimized in this experiment? (7) 2. In an experiment to measure the specific heat capacity of a liquid, the liquid was placed in a copper calorimeter. Energy was supplied to the system and the following data was recorded:Mass of calorimeter = 27.1g, Mass of calorimeter + liquid =71.3gInitial temperature of liquid = 17oCFinal temperature of liquid = 22oCEnergy supplied =985JDescribe, with the aid of a diagram, how energy was supplied to the system. (9)Calculate a value for the specific heat capacity of the liquid. The specific heat capacity of copper = 390J kg-1K-1. ...