Access the following web page: http://www.walter-fendt.de/ph14e/n2law.htm
- Follow the directions to set the Light Barrier (LB) to a distance (s) of 0.500 meter.
- Set the mass of the wagon, M, at 200 grams. Use this mass for all determinations.
- The force that is applied to the wagon is from the hanging mass being acted on by gravity, so that F = m.g, where m is the hanging mass in kg and g is the acceleration due to gravity, 9.8 m/s2. Remember that the mass must be in kg for this calculation.
- Five runs will be completed using the five hanging mass values in the Table.
- Calculate the Force applied (mg) and record it in column (2) of the data sheet.
- Record the time for the wagon to travel 0.500 m in column (3) of the data sheet.
- Calculate the average velocity of the wagon using Vave = 0.500 m/t, and record it in column (4) of the data sheet.
- Calculate the final velocity of the wagon using the relationship Vfinal = 2 Vave and record it in Column (5) of the data sheet.
- Calculate the acceleration of the wagon by dividing the Vf by the time and record it in column (6) of the data sheet.
- Calculate the acceleration of the wagon + hanging mass using a = F/(M + m) and record it in column (7) of the data sheet. (This assumes a coefficient of friction = 0)
Mass of wagon = M = 200 g = 0.200 kg
Distance (s) = 0.500 meters