Question

What is the best description of the acceleration of an object?

An airplane changes elevation from 10,000 ft to 5,000 ft.


A remote-control car speeds up from 0 m/s to 15 m/s.


A car's velocity changes from 25 m/s to 20 m/s in 5 seconds.


A runner travels 100 m in one minute.

Answer 1

A car's velocity changes from 25 m/s to 20 m/s in 5 seconds.

Explanation:

HI

Answer 2

A car's velocity changes from 25 m/s to 20 m/s in 5 seconds.

Explanation:

By definition, Acceleration is the rate of change of Velocity of an object.

I.e it is the( final velocity minus initial velocity ) ÷ by the time it took for the velocity to change.

If we observe the choices only one choice gives us all 3 components (final velocity, initial velocity, time taken for velocity to change), which is :

A car's velocity changes from 25 m/s to 20 m/s in 5 seconds.