A particle moves for 20 s with speed 6 m/s and then speed 8 m/s for another 20 s and finally moves with speed 10 m/s for next 20 s. What is the average speed of the particle?
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Total distance covered by particle d
=v1t1+v2t2+v3t3∵t1=t2=t3=20secd=20(3+4+5)= 240 m
Total time,
T= 3×20 =60sec.
Avg velocity v=Td=60240=4 m/s
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