The following data was recorded. Mass of body A Mass of body B
300 g 420 g
Distance travelled by A for 0.3 s before the collision 4.3 cm Distance travelled by A and B together for 0.3 s after the collision 1.8 cm (i) Draw a labelled diagram of the apparatus used in the experiment. (ii) Describe how the time interval of 0.3 s was measured.
(iii) Using the data, calculate the velocity of body A before and after the collision. (iv) Show how the experiment verifies the principle of conservation of momentum. (v) Give two precautions that the student took during the experiment.
Q2 A student carried out an experiment to investigate the relationship between the force applied to a body and the acceleration of the body. The table shows the measurements recorded by the student.
Table 3.4 Force / N Acceleration / cms2
0.05 35
0.06 40
0.07 47
0.08 50
0.09 61
0.11 0.135 74
90
(i) Draw a labelled diagram of the apparatus used in the experiment. (ii) Plot a graph, on graph paper, of the acceleration against the applied force. (iii) Calculate the slope of your graph and hence determine the mass of the body.
(iv) What does your graph tell you about the relationship between the acceleration of the body and the force applied to it? Justify for answer.
(v) How was the effect of friction reduced in the experiment?
Q3 A student carried out an experiment to measure the acceleration due to gravity, g, by a free-fall method. The table shows the data recorded by the student.
Table 3.5 s / cm
t / ms 40 286 50 319 60 350 70 375 80 404 90 423
(i) Draw a labelled diagram of the apparatus used in the experiment. (ii) Describe how the student obtained the data in this experiment.
(iii) Calculate a value for the acceleration due to gravity g by plotting a suitable graph, on graph paper.
(iv) Give one precaution that should be taken to ensure a more accurate result.
