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

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

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:

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

the motion of a pendulum is a classic example of mechanical energy conservation. a pendulum consists of a mass (known as a bob ) attached by a string to a pivot point. as the pendulum moves it sweeps out a circular arc, moving back and forth in a periodic fashion.