A plane traveling at 80 m/s is slowing down on the runway. In 15 seconds, the plane comes to a complete stop at the gate. How do you calculate the acceleration of the plane?

1 Answer
May 17, 2017

#a = ##Deltav##-:Deltat#

Explanation:

Acceleration is equal to change in velocity divided by the change in time.

If the plane stops, the finishing speed is 0m/s. As you mentioned, the speed at which the plane is at when it starts to slow down is 80m/s. The change in velocity must therefore be -80m/s (Change in velocity is finishing speed minus starting speed so this number must be a negative)

#a = ##-80##-:Deltat#

The time at which the plane started to slow down is 0 seconds, and the plane takes 15 seconds to slow to a stop. The change in time must therefore be 15 seconds.

#a = ##-80##-:15#

#a = -1.2#m/#s^2#

Hope this helped you!