Question

Calculate the acceleration of a bus full speed changes from 6 miles to 12 miles over a period of three seconds

Answer 1

Answer:

0.90m/s²

Explanation:

Given parameters:

Initial speed  = 6miles/hr

Final speed  = 12miles/hr

Time taken = 3 seconds

Unknown:

Acceleration = ?

Solution:

Acceleration is the rate of change of velocity with time. It is mathematically given as:

         Acceleration  = $\frac{Final speed - Initial speed}{Time}$

We need to convert miles/hr to meters/seconds

Initial speed = 6 x $\frac{miles }{hour}$ x $\frac{1hr}{3600s}$  x $\frac{1609.34m}{1mile}$

                      = 2.68m/s

Final speed = 12 x $\frac{1609.34}{3600}$  = 5.37m/s

      Acceleration  = $\frac{5.37 - 2.68}{3}$   = 0.90m/s²