Two-dimensional explosion

Two-dimensional explosion: A firecracker placed inside a coconut of mass M, initially at rest on a frictionless floor, blows the coconut into three pieces that slide across the floor. An overhead view is shown in Fig. 9-14a. Piece C, with mass 0.30M, has final speed vfc = 5.0 m/s. (a) What is the speed of piece B, with mass 0.20M?

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Fig. 9-14 Three pieces of an exploded coconut move off in three directions along a frictionless floor. (a) An overhead view of the event.

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