First slide

Average Velocity

Question

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

Moderate

A

15 m
B

30 m
C

55 m
D

None of these

Solution

distance covered = s = $v_{av} \times time$
For 1st second: $S_{1} = 5 \times 1 = 5 m$
For 2nd second : $S_{2} = 10 \times 1 = 10 m$
For 3rd second : $S_{3} = 15 \times 1 = 15 m$
Total distance traveled
$S = S_{1} + S_{2} + S_{3} = 5 + 10 + 15 = 30 m$

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