A student attempts to find the acceleration due to gravity on Earth (g) by analyzing the motion of a glider released from rest down an inclined air track. To compute g, the student measures the time interval it takes the glider to travel between the photogates set up over the air track, the distance between the photogates and the angle that the air track makes with the horizontal.
The student obtains g=9.93m/s2. Using the list below, choose all possible reasons for such a result.
The actual distance between the photogates is greater than measured.
The actual distance between the photogates is smaller than measured.
There is a certain amount of friction between the glider and the air track.
The actual angle that the air track makes with the horizontal is greater than measured.
The actual angle that the air track makes with the horizontal is smaller than measured.
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