Question

Pls answer my question:

Answer 1

Given values are listed below.

$x_1=10m\\x_2=15m\\t_1=40s\\t_2=50s$

We know that

$v=\frac{dx}{dt}$

 $=\frac{x_2-x_1}{t_2-t_1}$

 $=\frac{15-10}{50-40}$

 $=\frac{5}{10}$

$=0.5\frac{m}{s}$

∴ Option D is the correct answer.