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# December_2010_Physics_Exam_Numerical_answers - 7 – 8 a...

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December 2010 Physics Exam NUMERICAL ANSWERS Part A 1. 82.2 W 2. a) i) 225 m ii) -75 m b) sketch includes two horizontal lines, one at a = 6 ms -2 from t=0 to t =5 s and one at a = 1.33 ms -2 from t = 5 to t = 20 s. 3. a) 38.4 ms -1 b) 2.75 x 10 3 N (correct; note speed is not constant) [incorrect answer based on constant speed: 1.37 x 10 3 N) 4. a) 38.6 ° b) 25.7 ° ; 38.6 ° c) 2.08 x 10 8 ms -1 5. 0.58 6. T1 = 12.0N; T2 = 17.0 N; T3 = 12.0 N
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Unformatted text preview: 7. – 8. a) 3.33 x 10-3 sb) 1/10 6 9. a) 0.86 ° b) 66 c) 23.4 ° 10. a) 4.24 m b) 45 ° 11. b) i) 1.5 m ii) 4 m iii) 1.27 Hz iv) 5.08 ms-1 c) 12 ms-1 d) 45.5 ms-2 Part B 1. a) 2.56 ms-1 b) 3.13 ms-1 d) 13.0 revolutions 2. a) 37.0 N b) 8.00 m [incorrect answer based on ‘above’ horizontal: 94.2 m 3. a) 0.476 ms-1 b) 0.0563 m c) 0.743 s d) 0.0482 m; -0.245 ms-1 e) 0.0398m...
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