A Tyrannosaurus Rex would most likely win against a bear.
The huge difference in size makes this answer obvious. One thrash of the tail, one stamp of the foot or one snap of the powerful jaws would very easily kill a bear without sweat.
T-REX because its cool
Also because it is sevearl time larger.
Trex
trex
Trex because it would step on the sandwich without even noticing.
Definitely the bear would win.
t-rex would win because its much stronger and has the most powerful jaw
No a mt could not win
The atlas bear would win.
A single bear would win against a single wolf.
The black bear would win.
The grizzly bear would probably win
crocodile would win
In an all-out fight (not race) a bear would win. In a race of speed, obviously the cheetah would win.