9702/51/M/J/21: A student investigates the collision of two gliders A and B on a linear air-track. A card is attached to glider B, as shown in Fig. 2.1. Glider B has a mass M. A mass m is added to glider B. Glider A travels at a constant velocity u towards the stationary glider B. The gliders then collide and move together towards the light gate. The card passes through the light gate which is connected to a data logger. The student records the velocity v of the two gliders from the data logger.
The student changes the mass m and repeats the experiment. It is suggested that v and m are related by the equation \(Au = (M + m + A)v\) where A is the mass of glider A.
Sample solutions for practical Paper 5 variant 1 Question 2 May/June 2021 Cambridge A Level Physics.
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