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Kinetic energy
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what kinetic energy is, how to solve for it, examples, and overview
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By: Isha SenjaliyaKINETIC ENERGY
What is Energy? Kinetic energy is energy due to motion. Anything that is moving
Energy is the ability to do can be made to do work because of its motion.
work. If something has
energy, it can give it to Kinetic energy is a SCALAR quantity and is measured in Joules (J)
something else by doing
work. In order to have Kinetic energy depends on 2 things:
energy, work must be - The speed of an object. The faster it is the more kinetic
done. energy and slower it is the less kinetic energy it has.
- The mass of the object. The more mass the more kinetic
All physical processes can energy, and the less mass the less kinetic energy.
be understood as the
transformation of one type
of energy into another
type of energy.
Calculating Ek
Kinetic energy (Ek)
- Thermal Ek= 1/2mv2
- Light M= mass
- Sound V= speed
- wind Ek= kinetic energy
Example:
A truck with a mass of 1500 Kg is moving at a speed of 14m/s. what is the Ek of the
truck?
Use formula= EK= I/2mv2
Put numbers into formula= Ek= ½(1500kg) (14m/s)2
Get answer of= 147000J
Use significant digits= 1.5 * 10^5 J
You can use the kinetic For example,
energy formula to solve manipulate the Ek
for other variables as formula to find mass
well, in order to do that and speed. Make sure
you must isolate them. to remember both sides
of the equation are
balanced.
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