Teaching Physics with the Physics Suite

Edward F. Redish

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The astronaut and the cream pie*

A 77 kg astronaut, freely floating at 6 m/s is hit by a large 36 kg lemon cream pie moving oppositely at 9 m/s. How much thermal energy is generated by the collision?

* From Patrick H. Canan, A Beginner's Guide to Classical Physics (1992)

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Page last modified October 9, 2002: P&E05