# physics

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what is the kinetic energy of a 3 kg 20 cm diameter bowling ball with a linear velocity of 4m/s? (rolling and spinning)

• physics -

What is step one?

What is step 2?

2. Find your key words to see what you are trying to find. if you need me to go any further, I will.

• physics -

This girl, I suspect you have no clue here.

The KE at the bottom consists of rolling KE, and translational KE.

KE rolling=1/2 (momentinertia)w^2
KE translational=1/2 m v^2

so what is the momentofinertia of a solid sphere? http://en.wikipedia.org/wiki/List_of_moments_of_inertia

Put in v, and radius, and calculate.

• physics -

How did you know. XD i was just trying to allow him to try and figure it out.

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