[Physics Class Notes] on Pound – Unit of Weight Pdf for Exam

During your school days, you used to prefer a pound or a two-pound cake for your birthday celebration. So, do you know what is the lbs unit and how much is a pound in weight? Well, it is very essential that you must know what is the lbs means in weight. The pound is one of the most popular units that are used to measure the mass or matter of an object or a body. 

In many ways, scales are used to measure the weight or mass of a body. Different types of scales are used to measure different objects of different sizes. Pounds are defined as the unit of weight of an object. This type of weighing in pounds is generally used in Britain. It is also denoted as Lb or Lbs in short.

The full form of Lb is Libra which is a Latin word meaning balance or scales. It also stands for the ancient Roman unit of measure “libra pondo” which means “a pound by weight.”

History of Pounds 

Pounds (lb) and kilograms (kg) are two of the most commonly used units to measure the mass of a specific body. Therefore, accurate conversion between these two is very essential and important for accurate trade, engineering, and science study. Keeping this in mind, six nations gathered in 1959 and agreed to have an exact conversion between the pound and the kilogram.

Therefore on the 1st of July 1959, the six countries signed an international yard and pound agreement. As per the agreement, the value of a common pound is exactly 0.45359237 kilograms. Other countries made it legal at various times by signing this agreement. In 1951, most of the commonwealth nations agreed to this conversion.

This agreement is not just a link between the pound and the kilogram but also a link between the metric system and mass units. There are also 16 ounces in a pound, where one ounce is (0.45359237/16) kilograms.

Conversion Of Pounds 

Pound Measurement

The conversion of pounds to kilograms calculation can be done using a conversion factor of 2.2 pounds in 1 kilogram. 

For instance, the value of 120 pounds in kilograms is 54.4310844. It is almost close to a mental calculation. 

To Convert Pounds to Kilogram

1 pound (lb) = 0.45359237 kilograms (kg).

Therefore, m(kg) = m(lb) × 0.45359237

Similarly, we can find other quantities as well. If we wish to find out the same in kilograms, then we have to divide the value we obtained above by 1000, so here we go

907.18474/1000 = 0.90718474 kg

So, 2 pounds in kg is 0.90718474 kg.

One more thing to know about the pound unit is: 1 kilogram or kg is equal to 2.20462 pounds or 2.2 Ibs. So, whenever you wish to determine the value of ‘n’ kg in pounds, just multiply it by 2.2 Ib, you will get the value in n * 2.2 Ibs. 

Do You Know?

1. Do You Know How Many Hours a Pound of a Propane Tank Last? 

Well! A standard 1-lb propane tank provides around 1½ hours of cooking time on high heat. However, an optional accessory hose allows you to connect a standard 20 lb propane tank to the grill for 20+ hours of cooking time.

2. Do You Know How Much a Full 100-pound Propane Tank Weighs?

Well! It weighs around 170 pounds.