Kinetic energy is the energy of a moving object.
Kinetic energy can be calculated using the following equation;
K.E =
where - m - mass of object
v - speed of object
substituting the values in the equation
K.E = 1/2 x 21 kg x (1 m/s)²
K.E = 10.5 J
Ek = 6KJ.
In physics, the kinetic energy of a body or object is the one that owns due to its movement and is given by the equation 
, where m is the mass of the object in kilograms and v is the velocity in m/s.
An object that it has a mass of 30 kilograms and moves with a velocity of 20m/s, its kinetic energy is given by:
Answer and Explanation:
By measuring in millimeter we can decrease the associated error with the measurement because when we measure in smaller unit the measurement is more precise and accurate rather than when we measure in larger unit so when we measure 325 millimeter instead of 32.5 cm then there is chance of less error produced.
The light passes from one medium to another
