Eduqas Physics A Level: Revision Workbook 1

2. Vivienne carries out an experiment to measure g , the acceleration due to gravity, by freefall. She uses the following set up: electromagnet electronic timer hinged metal plate steel sphere switch break contact 0.00 s (a) Use the equation: x ut at 2 1 2 = + to show that a graph of time, t , against the square root of height ( h ) should be a straight line through the origin with gradient g 2 . [2] ......................................................................................................................................................................................................................................................................................................................................... ......................................................................................................................................................................................................................................................................................................................................... ......................................................................................................................................................................................................................................................................................................................................... (b) Her results are recorded in the following table: Height, h /m /m h Freefall time / s 1 2 3 4 Mean, t 0.150 0.387 0.20 0.20 0.20 0.20 0.200 0.400 0.632 0.32 0.31 0.31 0.32 0.315 0.900 0.949 0.43 0.47 0.44 0.44 0.445 1.500 1.225 0.57 0.58 0.58 0.55 0.570 2.000 1.414 0.68 0.64 0.68 0.67 0.668 Table 1 170 | Eduqas Physics for A Level: Revision Workbook 1 | Practice papers