Lesson: Average Speed and VelocityPhysics
In this lesson, we will learn how to calculate the average speed or velocity of an object referring to the variation of their distances or displacements with time.
Sample Question Videos
An airplane leaves Chicago and makes the -km trip to Los Angeles in s. A second plane leaves Chicago s later and arrives in Los Angeles at the same time. Find the ratio of the average velocities of the two planes. Ignore the curvature of Earth and the difference in altitude between the two cities.
A sonar echo returns to a submarine 1.20 s after being emitted. Find the distance to the object creating the echo. Use a value of 1,540 m/s for the speed of sound in sea water.
If the Sun suddenly stopped shining, we would not know that until just after the last light that the Sun had emitted arrived at Earth. Find how long it would take for this light to reach Earth. Use a value of m for the distance from Earth to the Sun and a value of m/s for the speed of light in vacuum.