Bone
Great white shark
No
A shark jaw should be 40 feet long
There are many different sharks, but I do not know which could be called, "Regular". But, assuming that you are asking about the shark jaw of a fish, and not the mechanical tool called a, "Shark jaw", the common range is from 2 inches to 15 inches, in my opinion. (There are lots of foot-long sharks in people's aquariums, and of course, in the ocean; hence, the 2" size) Of course, the jaw of, say, a great white shark can be significantly larger, while the largest shark jaw known (a fossilized shark) is over 12 feet in size, fully opened. If you want to own this monster jaw, you can buy it for around $500 million, as I understand it.
A Big Mac!
teeth
4 tons
No, the shark was mechanical. The shark did cause quite a bit of trouble though while it was being used.
Saw sharks have barbells, which are thin, fleshy, whisker-like organs on the lower jaw in front of the nostrils that sense touch and taste. Barbells help the shark locate their food.
The Goblin Shark has a retractable jaw
Loch - jaw
The mandibular arch in a shark is located in the lower jaw, where the primary jaw muscles attach to help with opening and closing the jaw during feeding. Sharks have very flexible jaws that can protrude forward to better grasp and consume prey.