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physics

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A woman on a bridge 81.6 m high sees a raft floating at a constant speed on the river below. She drops a stone from rest in an attempt to hit the raft. The stone is released when the raft has 9.13 m more to travel before passing under the bridge. The stone hits the water 4.30 m in front of the raft. Find the speed of the raft.

  • physics - ,

    The stone takes 4.08 sec to hit the water.

    The boat moved 9.13-4.30=4.83m in 4.08s
    So, its speed is 1.18 m/s

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