It is important to understand the concept of speed and how it is related to other concepts in physics. Students are often asked to calculate the speed of an object in various situations. In this article you will learn how to calculate the impact speed of an object when it is dropped from a given height.
Read the problem carefully, drawing a diagram and identifying key information like the height and the initial speed of the object.
Convert the speed to meters per second (m/s) and the height to meters (m).
Square the initial speed of the object in m/s by muliplying the speed by itself. If the object is dropped from rest, the initial speed is zero.
Multiply the height of the object in meters by 2 and 9.8 m/s^2 (the acceleration due to gravity).
Add the two products found in Steps 3 and 4.
Take the square root of the sum found. This number is the impact speed of the object in m/s.
Write out each step. Use a pencil in case you make mistakes.