Question

I want general information ,
In my Mathematics Book there is a question in which mass is given in unit
"lb"
what is it stands for, or what is its full form ?

[if K.E is 4320ft/lb when mass is 45lb an velocity is 24ft/sec]

Answer 1

Answer:

lb stands for pounds.which is unit of mass .

according to question the mass of 45lb in kg is 20.412 kg