Question

A particle moves in a straight line with a velocity 8 ms−1 for 2 seconds and then with a velocity 10 ms−1 for 5 seconds. Find the average velocity during this time interval?

Answer 1

Answer:

9.43 m/s

Explanation:

during the first interval,

v = 8 m/s

t = 2 s

=> s = vt = 16 m

during the second interval,

v = 10 m/s

t = 5 s

s = vt = 50 m

average speed = total distance / total time = 50+16 / 5+2 = 66/7 = 9.428 m/s