Mjolnir

Thor's hammer, Mjolnir is one of the strongest comic book weapons and the proud owner of this hammer is Thor, the Norse god of thunder. Mjolnir, meaning "that will smash" is a hammer made out of a mystical ore called Uru. It was forged by three dwarfs, Eitri, Brok and Buri, using the inner core of a star as a mold. These three dwarfs were told to make this hammer from Odin, chief of the Norse gods. While the dwarfs were making the hammer, the star exploded and it is believed that this explosion killed off the dinosaurs. This explains the hammers unbelievable strength and power. The hammer was also enchanted with many powerful spells by Odin and can summon the elements wind, rain, lightning and thunder. By throwing the hammer and holding onto the strap, Thor is able to fly around at a ridiculous speed. 

So now getting into the question, how much does Thor's hammer really weigh? Well Marvel made a trading card for Thor's hammer and on the card, it says it weighs 42.3 lbs. That's like carrying a 5 gallon jug filled with water everywhere you go. So this brings up the question about why The Hulk wasn't able to lift Mjolnir in The Avengers. Odin enchanted the hammer so that it can only be wielded by someone who is worthy of it's power. With The Hulk in his green, angry state, he is unable to lift Mjolnir until he cools down and becomes human again. This means that The Hulk technically could wield Thor's hammer if he proved himself worthy. This also brings up the question about why Loki was unable to lift Mjolnir while it was on his chest, and why it didn't crush his chest in the first place. Well Loki obviously being unworthy to lift the hammer, is stuck lying on the ground with Mjolnir on his chest. But why wouldn't his chest crush? The human chest can take approximately 163 lbs. So even if the hammer weighed in at 160 lbs, Loki would have to be a pretty weak god to not be able to push that weight off his chest. 

Although the hammer is commonly believed to be made from the core of a dying star, it was actually made inside of the core of a dying star. Many people actually believe that the hammer is made up of the heart of a dying neutron star. A neutron star is so dense that one sugar cube of its material would have equal mass of all of humanity; approximately 400 million metric tons. This means that Mjolnir would weigh around 4.6 trillion metric tons. Having so much mass in such a small object would be utterly catastrophic. If the hammer were to be dropped at that weight, it would finish humanity all together and would be more disastrous than the asteroid that killed off the dinosaurs. It would also contain its own force of gravity which would pull humans in at the speed of light and tear their body apart; while it sinks into the ground and is attracted to the earths core.

Now that we know the weight of Mjolnir to be 42.3 lbs, we can use the equation p=mv to calculate the momentum on Thor and his hammer as they travel at max speed. The Thor Fansite lists the max velocity of Thor and his hammer at around 11265 meters per second. With m being mass in kg, we need to change 42.3 lbs to kg which would equal approximately 19.19 kg. The velocity used in this equation is for both Thor and his hammer, so we must use the mass of both Thor and his hammer too. Thor is believed to be 640 lbs which is 291kg. With v being velocity in meters per second, we do not need to change the value given to us. Now lets solve for p:

Thor flies by spinning his hammer in circles, letting it accelerate and pick up speed until suddenly he flies into the air and is off like a bullet. With the momentum, weights of both the hammer and Thor, and we know the initial velocity of Thor to be 0m/s, we can now find the initial velocity of Thor's hammer before he flies away. To find this velocity, we will use the equation p=m1v1 + m2v2 

That means that Thor's hammer is spinning at a velocity of 182,292 m/s right before he takes off and flies away. This is a tremendous speed considering normal handguns shoot bullets at around 400-450 m/s and a jet flies at a speed of around 1000 m/s.

You may not agree with variables or believe them to be true, but then again, when was the last time you were able to ask Thor how heavy his hammer was? Exactly. Thor has stood as a super hero, friend and role model for many decades and he gives kids endless joy and entertainment. Without Mjolnir, Thor would just be some super strong, good looking god with a super cool family and planet. But with Mjolnir, he is the god we know and love; he is Thor.