If a car is moving with the speed of 15 m s-1
for 10 minutes in a long straight
road, How much distance car would be moved from its initial position?
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Explanation:
For constant velocity :
Constant velocity u=10 m/s
Time t=10 s
So, displacement in 10 seconds S
1
=ut=10×10=100 m
For accelerated journey :
Initial speed u=10 m/s
Acceleration a=2 m/s
2
Time t=5 s
Displacement in 5 seconds, S
2
=ut+
2
1
at
2
⟹ S
2
=10×5+
2
1
×2×5
2
=75 m
Total displacement in 15 seconds S
total
=100+75=175 m
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