Energy is the ability to do work. Work happens when something moves a distance against a force. Although it seems a little hard to comprehend, this is truly one of the most useful concepts in physics.
[am4show have='p9;p58;' guest_error='Guest error message' user_error='User error message' ] I’m willing to bet you spend a lot of your time moving things a distance against a force. Do you ever climb stairs, walk, ride a bicycle, or lift a fork to your mouth to eat? Of course you do. Each one of those things requires you to move something a distance against a force. You’re using energy and you’re doing work.
[am4show have='p9;p58;' guest_error='Guest error message' user_error='User error message' ] I’m willing to bet you spend a lot of your time moving things a distance against a force. Do you ever climb stairs, walk, ride a bicycle, or lift a fork to your mouth to eat? Of course you do. Each one of those things requires you to move something a distance against a force. You’re using energy and you’re doing work.
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