7. RECALL: In the previous lab about momentum, we had to do the percent difference twice. (Check the video at the
bottom of the lab to remind yourself of what you watched/measured.)
We had to complete the percent difference twice because momentum is a vector. If we were to analyze the same
video from before but in terms of energy, the error percentage will be higher than than normally acceptable.
Which factors of the experiment explain why there is a greater degree of error when calculating energy versus
calculating momentum? Note that some of the factors listed will introduce considerable error in either calculation.
Select all that apply:
Formula for energy involves velocity, which is found from incorrect formula of kinematics.
Unable to get the ruler to a straight line for the path of each puck.
Units for the mass of each puck is in grams and not kilograms.
Energy of the pucks has a greater error because this was a top-down view instead of side view.
Sound lost to the environment when the pucks hit.
Using the incorrect decimals for the mass.
Rounding error using percent difference equation.
