A car is moving along a straight line . It moves from O to P in 18s and returns from P to Q in 6 sec . Find its average velocity and average speed in going a) O to P and b) O to P and back to Q
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Answer:
Displacement from O to P=360m
Time taken from O to P=18sec
Velocity of car =
Time
Displacement
=
18
360m
Avg. Velocity of car (O to P)=20ms
−1
Time taken from P to Q=6sec
Total time taken to move from O to P and back at Q,
T
′
=16+6=24
Displacement from P to Q=240m
Average speed of car from P to Q=
24sec
240m
=10ms
−1
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