First slide
Rectilinear Motion
Question

A moving car possesses average velocities of 5 ms-1, 10 ms-1, and 15 ms-1 in the first, second, and third seconds, respectively. What is the total distance covered by the car in these 3 s?

Moderate
Solution

Distance covered =S=vav× time 
For first second: S1=5×1=5m
For second second: S2=10×1=10m
For third second: 5S3=15×1=15m
Total distance travelled

S=S1+S2+S3=5+10+15=30m

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