Question

A very good 197-lb weight lifter lifted 192 kg in a move called the clean and jerk. What was the mass of theweight lifted in pounds?

Short answer

The mass of the weight lifted in pounds is 423 lb.

Step-by-step solution

Defining the pound and kilogram terms

Pound (lb) -

It is a unit of mass in the British imperial unit. It is a \({\raise0.7ex\hbox{$1$} \!\mathord{\left/ {\vphantom {1 {2.20462}}}\right.}\!\lower0.7ex\hbox{${2.20462}$}}\) of a kilogram. There is also a term called the metric pound, which is half of the kg. It is denoted by lb.

\(1\,\,lb\,\, = \,\,{\rm{0}}{\rm{.453592}}\,\,kg\)

Kilogram (kg) -

It is a unit of mass in the International System of Units (SI base unit). It is approximately twice of pound’s mass. It is thethousandthtimes of gram. It is denoted bykg.

\(1\,\,kg\,\, = \,\,{\rm{2}}{\rm{.20462}}\,\,lb\)

Converting the mass from units of the pound into the kilogram

It is given that the mass of the weight lifter is 197 lb while the lifting mass is 192 kg.

We know,

\(1\,\,kg\,\, = \,\,{\rm{2}}{\rm{.20462}}\,\,lb\)

For conversion from kg to lb,

\(192kg = 192\left( {kg \times \frac{{2.20462lb}}{{kg}}} \right) = 192 \times 2.20461 = 423lb\)

Therefore, the mass lifted in pounds is 423 lb.