Kinetic Energy Tutorial



Kinetic Energy Tutorial
Kinetic Energy:
     Kinetic Energy is defined as the work needed to accelerate a body of a given mass from rest to its current velocity.

Kinetic Energy Formula :
Kinetic Energy: Ek = ½ mv2
Mass: m = Ek / ½ v2
Velocity:

where,
Ek = Kinetic Energy,
M = Mass of object,
V = Velocity or Speed of object,

Kinetic Energy Example:
Case 1: Determine the Kinetic energy of a 500kg roller coaster train which moves at a speed of 20 m/s.
 M = 500 kg, V = 20 m/s
  Step 1: Substitute the values in the below kinectic energy formula:
            Kinetic Energy: Ek = ½ mv2
            = ½ x 500 x 202
            = 0.5 x 500 x 400
            Kinetic Energy: Ek = 100000 Joules or 1 x 105 Joules
This example will guide you to calculate the kinetic energy manually.

Case 2: What is the speed of a 55 kg woman running with a kinetic energy of 412.7 J?
 Ek = 412.7, M = 55 kg
  Step 1: Substitute the values in the below Velocity formula:
           
This example will guide you to calculate the velocity manually.



This tutorial will help you dynamically to find the Kinetic Energy problems.