Practise Edexcel A-Level Physics improving experimental methods with video timing, light gates, data loggers and reduced percentage uncertainty.
A student determined a value for the acceleration of freefall g using the apparatus shown.
The student released the cylinder at a distance s from the bottom edge of the ramp. She measured the time t for the cylinder to travel the distance s.
The student suggested that adding a light gate near the top of the ramp and a light gate near the bottom of the ramp would improve the measurement of t.
Describe advantages and disadvantages of using light gates to measure t.
