Question

A particle moving with uniform acceleration in a straight line was first observed to be moving at 4.5m/s. After 10 seconds, it was moving at 6.8m/s. Find its acceleration.

Answer 1

The acceleration is

$$a=\frac{\Delta v}{\Delta t}=\frac{6.8-4.5}{10}=0.23\text{ m/s}^2.$$