Exam Questions (15 marks) 2 2 13 Q1.Two students investigated reflex action times. 3 6 13 4 7 9 This is the method used. 1. Student A sits with his elbow resting on the edge of a table. 5 7 8 2. Student B holds a ruler with the bottom of the ruler level with the thumb of Mean 7 X Student A. 3. Student B drops the ruler. 4. Student A catches the ruler and records the distance. Circle the anomalous result in Table 1 for Student A. (1) 5. Steps 1 to 4 are then repeated. (d) What is the median result for Student B? The same method was also used with Student A dropping the ruler and Student B catching the ruler. Tick one box. (a) Give variables the students controlled in their two 8 investigation. 11 12 _________________________________________(2) 13 (b) Figure 1 shows one of the results for the Student A. (1) (e) Calculate the value of X in Table 1. What is the reading shown in Figure 1? Mean distance ruler dropped = __________________ cm Reading on ruler = ___________________________ cm (1) (1) (f) Figure 2 shows the scale used to convert distance of the (c) Table 1 shows the students’ results. ruler drop to reaction time. Table 1 Calculate how much faster the reaction time of Student A Distance ruler dropped in cm Test was compared to Student B. number Student A Student B Use Figure 2 and Table 1. 1 9 12 Answer = _____________ s
Exam Questions (15 marks) Q1.Two students investigated reflex action times. This is the method used. 1. Student A sits with his elbow resting on the edge of a table. 2. Student B holds a ruler with the bottom of the ruler level with the thumb of Student A. 3. Student B drops the ruler. 4. Student A catches the ruler and records the distance. 5. Steps 1 to 4 are then repeated. The same method was also used with Student A dropping the ruler and Student B catching the ruler. (a) Give two variables the students controlled in their investigation. _________________________________________(2) (b) Figure 1 shows one of the results for the Student A. What is the reading shown in Figure 1? Reading on ruler = ___________________________ cm (1) (c) Table 1 shows the students’ results. Table 1 Test number Distance ruler dropped in cm Student A Student B 1 9 12 2 2 13 3 6 13 4 7 9 5 7 8 Mean 7 X Circle the anomalous result in Table 1 for Student A. (1) (d) What is the median result for Student B? Tick one box. 8 11 12 13 (1) (e) Calculate the value of X in Table 1. Mean distance ruler dropped = __________________ cm (1) (f) Figure 2 shows the scale used to convert distance of the ruler drop to reaction time. Calculate how much faster the reaction time of Student A was compared to Student B. Use Figure 2 and Table 1. Answer = _____________ s
practical-7-reaction-time.docx