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### Course: Middle school physics>Unit 3

Lesson 1: Kinetic energy

# Kinetic energy

Any object in motion has the property of kinetic energy. Simply put, kinetic energy is motion energy and depends on an object's mass and speed. As mass or speed increases, so does kinetic energy. Created by Khan Academy.

## Want to join the conversation?

• My brain is not braining. . . HELP ME!
• the kinetic energy get faster based on how hard you push it, also swis went fastest :)
• i wonder if this is based off of her dinner experience...
maybe she's trying to tell us that her daughter has bad politeness manners...
• Which is the best and simplest definition way to remember Kinetic and Potential Energy? Not too long, but a very short definition.
• Potential energy is energy that is capable of being exerted so potential energy is energy not released and kinetic energy is energy caused by an object moving. Hope this helps.
• Why do poeple dream, is there a place in the brain that makes people dream? If someone loses that place in the brain can they not dream or sleep or not dream.
• Man Idk but thats a good question
• Does this video show an example of how math and science go hand it hand
• Yes, because math is what is used to explain science in more precise ways.
• For the 1/2 part of KE=1/2mv^2 does the 1/2 only apply to the m part or is it applied for m and v^2?
• The kinetic energy formula means: 1/2 multiplied by the mass multiplied by velocity squared. You don't multiply half of the mass with half of the velocity squared because that would give you 1/4mv^2 instead.

Does that help?
• If the lighter cheese is lighter, then why is the heavier cheese going faster? They contradicted this in the acceleration section. Thanks!
• Acceleration and speed are different things. Acceleration is a vector, while speed is not. Acceleration measures how much an object speeds up over a period of time, and speed measures how far an object travels over a period of time.
• why do we do math in science?!?!?!?!?!