Question

1. While traveling along a highway a driver slows from 24 m/s to 15 m/s in 12 seconds. What is theautomobile's acceleration? (Remember that a negative value indicates a slowing down.)

Answer 1

Given data

*The initial speed of the driver is u = 24 m/s

*The final speed of the driver is v = 15 m/s

*The given time is t = 12 s

The formula for the automobile's acceleration is given as

`a=(v-u)/(t)`

Substitute the values in the above expression as

`\begin{gathered} a=(15-24)/(12) \\ =-0.75m/s^2 \end{gathered}`