Question

Calculate the acceleration of an airplane that starts at rest and reaches a speed of 45 m/s in 9 seconds

Answer 1

Because no mass or force is given for this equation, we'll use a simplified formula for acceleration:

`a = (v_2 - v_1)/(t)`

v1 is the initial velocity. v2 is the final velocity. t is the amount of seconds that elapse.

The airplane starts at rest, or at 0 m/s. In 9 seconds, the airplane reaches a speed of 45 m/s. Plug these values into the formula:

`(45 - 0)/(9) = (45)/(9) = \boxed{5}`

The airplane's acceleration is 5 meters per second squared.