Question

4a. calculate the mass of an object that weighs 180 pounds at sea level on earth (1 pound = 2.205 kg)

Explanation:

Step1: Convert pounds to kg

Given \(1\) pound \( = 2.205\) kg.
For an object of \(180\) pounds, we use the conversion formula \(m=\text{weight in pounds}\times\frac{\text{kg}}{\text{pound}}\).
So \(m = 180\times2.205\)

Step2: Calculate the product

\(180\times2.205=(100 + 80)\times2.205=100\times2.205+80\times2.205\)
\(100\times2.205 = 220.5\), \(80\times2.205=(8\times2.205)\times10=(17.64)\times10 = 176.4\)
\(220.5+176.4 = 396.9\)

Answer:

\(396.9\) kg