Question

A rollercoaster travels with a velocity of 12.5 m/s. the rollercoaster takes 4.5 seconds to travel up a steep ramp and the velocity changes to 6.2 m/s. what is the rollercoaster's average acceleration

Answer 1

The rollercoaster's average acceleration is - 1.4 m/s²

Initial velocity, $V_{1}$ = 12.5m/s

Final velocity ,$V_{2}$ = 6.2m/s

Time taken = 4.5 sec

acceleration = rate of change of velocity

  A(avg) = dV / dt

        dV = Final velocity - initial velocity

          $dV =$    $V_{2} -V_{1}$

               = 6.2m/s - 12.5m/s

               = - 6.3m/s²

A(avg) = -6.3m/s / 4.5 s

A(avg) = - 1.4 m/s²

The negative sign indicates that the object is slowing down.

To know more about acceleration :

https://brainly.com/question/11632129

#SPJ4