If an aeroplane travels at 5000 m. p.h for an hour and 45 minutes, what distance does it travel?

8750 miles

Explanation:

The airplane travels with uniform motion (=constant velocity), so we can calculate the distance it travels using the formula for uniform motion:

where

v is the speed of the plane

t is the time elapsed

In this problem:

v = 5000 mi/h is the speed of the plane

t = 1 h 45 min is the time elapsed

We have to convert this time into hours; we know that 45 minutes corresponds to 3/4 of an hour, that is 0.75 hours. So, the time here is

Therefore, the distance covered is:

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.