Question

3. An airplane increases its speed from 100.0 m/s to 160.0 m/s, at the average rate of 15.0 m/s2. How much time does it take for the complete increase in speed?

Answer 1

By definition of average acceleration,

`\bar a=(\Delta v)/(\Delta t)`

`\implies15.0\,(\mathrm m)/(\mathrm s^2)=(160.0\,(\mathrm m)/(\mathrm s)-100.0\,(\mathrm m)/(\mathrm s))/(\Delta t)`

`\implies\Delta t=4.00\,\mathrm s`