Suppose your bathroom scale reads your mass as 60 kg, with a 4% uncertainty. what is the uncertainty in your mass in kilograms?

To solve for the uncertainty of your mass in kilograms, simply multiply your total mass with the percent uncertainty.

We know that 4% = 0.04, therefore:

uncertainty = 60 kg * 0.04

uncertainty = 2.4 kg

However since uncertainty covers the upper and lower region, therefore correct answer must be:

± 2.4 kg