The speed of the particle at time= 6 sec
Suppose that two objects A and B are moving with velocities (each with respect to some common frame of reference). Letrepresent the velocity of A with respect to B. Then
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Rain is falling vertically with a speed of 30 ms^{−1}. A woman rides a bicycle with a speed of 12 ms^{−1 }in east to west direction. In which direction she should hold her umbrella?
A river is flowing from west to east with a speed 5 ms^{−1}. A swimmer can swim in still water at a speed of 10 ms^{−1}. If he wants to start from point A on south bank and reach opposite point B on north bank, in what direction should he swim?
A girl riding a bicycle with a speed of 5 ms^{−1} towards north direction, observes rain falling vertically down. If she increases her speed to 10 ms^{−1}, rain appears to meet her at 45^{∘} to the vertical. What is the speed of the rain?
304 docs275 tests

304 docs275 tests
