Question

A person travelled along the x-axis for 5.5 seconds. The person's final and initial positions are -1.0 m and 10.0 m respectively. What is the person's average velocity? a) 2.0 m/s

b) 1.6 m/s
c) -1.6 m/s
d) -2.0 m/s

Answer 1

d) -2.0 m/s

Step-by-step explanation:

Time taken by the man is 5.5 seconds

Final position = -1 m =
`x_f`

Initial position = 10 m =
`x_i`

Total distance covered

`\Delta x=x_f-x_i\\\Rightarrow x=-1-10=-11\ m`

Velocity = Distance / Time

`v=(-11)/(5.5)\\\Rightarrow v=-2\ m/s`

∴ Person's average velocity is -2m/s