# EVERYDAY SCIENCE

## SCIENCE

### PHYSICAL SCIENCES

 Question [CLICK ON ANY CHOICE TO KNOW THE RIGHT ANSWER]
Which of the following is not used to calculate kinetic energy?
 A Mass B Weight C Height D Speed
Explanation:

Detailed explanation-1: -For the gravitational force the formula is P.E. = mgh, where m is the mass in kilograms, g is the acceleration due to gravity (9.8 m / s2 at the surface of the earth) and h is the height in meters. Notice that gravitational potential energy has the same units as kinetic energy, kg m2 / s2.

Detailed explanation-2: -Based on the general equation for kinetic energy, Ek=½mv2, which directly uses mass (m) and velocity (v), the following formula is used to calculate the kinetic energy of a projectile (expressed in foot-pounds):

Detailed explanation-3: -The only energy that is not considered kinetic energy is chemical energy, this type of energy is potential energy that is stored in the object, in the union of its atoms and molecules.

Detailed explanation-4: -Potential energy is the stored energy in any object or system by virtue of its position or arrangement of parts. However, it isn’t affected by the environment outside of the object or system, such as air or height. On the other hand, kinetic energy is the energy of an object or a system’s particles in motion.

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