How powerful are sharks?

VERY. some sharks can severly damage boats even sink them. some sharks are capable of seeds up to 45mph and leaps of 20ft out of the water. most sharks, however, are docile and will leave you alone if you leave them alone. never does a shark attack unless it is provoked or mistakes surfers to look like seals. hey people make mistakes to. also we'er in their territory, they were here first.