A light gate and data logger can be used to determine the speed of each rider and sled What two measurements are needed to determine the speed of a rider and sled? Select two answers only Gravitational field strength Length of sled Mass of rider and sled Temperature of surroundings Time for sled to pass light gate

## Step 1: The question is asking for the two measurements needed to determine the speed of a rider and sled. Speed is defined as the rate at which an object covers distance. The formula for speed is:### ## Step 2: From the formula, we can see that to calculate speed, we need two measurements: distance and time. ## Step 3: Looking at the options provided, the "time for sled to pass light gate" is the time measurement we need. ## Step 4: The distance measurement is not directly given in the options. However, if we know the length of the sled and the sled passes completely through the light gate, then the length of the sled can be used as the distance measurement.