# physics

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a bowling ball has a mass of 8kg. if it rolls down the alley, without slipping, at 7m/s, calculate a) the linear kinetic energy, b) the rotaional kinetic energy, c) the total kinetic engergy

• physics -

The maximum legal mass of a bowlng ball is actually 7.27 kg, but who's counting?

a) (1/2)MV ^2, of course

b) (1/2) I w^2
Use (2/5)M R^2 for the moment of inertia, I, and V/R for the angular velocity w.
You will get an expression in terms of M and V. R will cancel out.
c) Add the results of a and b
You should get (7/10)M*V^2

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