Question

14.
A particle moves with a constant velocity of 4 m/s for 2 seconds in a straight line. It continues in the
same direction with a velocity of 2 m/s for 4 seconds. What is its average velocity?
A) 16 / 3 m/s
B) 4 / 3 m/s
0) 2 / 3 m/s
D) 8 / 3 m/s​

Answer 1

Option d ✓

Explanation:

8/3 m/s is the correct answer:)

Answer 2

u=10m/s

v=20m/s

x=130m

a = v−u/t

= 20−10/t

= 10/t

s=ut+1/2at^2

⟹ 135 = 10t+10t^2/2t

⟹ t = 9s

t

2