1) Paxin taped the protractor to the mousetrap and Sarah tied the string to the mousetrap arm.
2) Then Paxin tied the string to the spring scale and set the scale equal to zero.
3) Paxin then pulled the scale so that it would match up with the 10-degree line on the protractor. Mark then told us the force in dynes by multiplying the force in newtons by 100,000. Everyone in the group wrote down this number in their logbooks.
4) Paxin, Sarah and Mark repeated this procedure 10 times, each time aligning the mousetrap arm with a number divisible by 10 (20,60 etc.)