A stone is thrown at a bell with the speed of 20ms. the, Ask an Expert

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Q1. A man can row a boat at the speed of 6.8 km/h in still water. If he is crossing a river where the current is 2.8 km/h, in what direction should his boat be headed if he wants to reach a point directly opposite his starting point?

Q2. A ball rolls horizontally off the edge of a tabletop that is 1.08 m high. It strikes the floor 2.80 m away from the edge of the table. What is the initial (horizontal) velocity of the ball? Overlook air resistance.

Q3. A stone is thrown at a bell with the speed of 20m/s. The stone strikes the bell and the sound is heard 2.60 s after the stone was released. Speed of sound is 342m/s, how far is the boy from bell?

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