JEE Main Physics question
Tom and Dick are running forward with the same speed , side by side. They are throwing a rubber ball to each other (across the gap between them) at a constant speed as seen by the thrower. According to Sam, who is standing on the ground, the speed of the ball is [DUMET 2009]
Answer: (B)
Solution
Since Tom and Dick run with identical velocity (same speed, same direction), they are mutually at rest, so the ball's velocity relative to either of them, of magnitude , is directed across their (constant) separation — i.e.
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