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Acceleration – simple physics

By |2018-05-31T11:49:28+00:00August 17th, 2017|Physics|

Tegla Loroupe, Kenyan runner Acceleration is how much your speed changes in a certain amount of time. Picture yourself standing in front of your house. When you stand still, your acceleration is zero. When you begin to walk, your speed is changing - that's what acceleration is - it measures how fast your speed [...]

Newton’s Second Law of Motion – Physics

By |2018-05-31T11:49:28+00:00August 17th, 2017|Physics|

How hard will the ball hit the catcher's glove? It depends how big the ball is. how fast the pitcher throws it, and how far away the catcher is. Like the First Law of Motion, the Second Law of Motion started out with work in the medieval Islamic Empire, about 1000 AD in [...]

Newton’s Second Law of Motion project

By |2018-05-31T11:49:15+00:00August 17th, 2017|History|

Gravity is an important cause of acceleration Newton's Second Law of Motion tells us that force equals mass times acceleration. You can try this out for yourself. Here's a website with a good experiment you can do. More about the Second Law of Motion More about Ibn Sina Bibliography and further reading about Newton's [...]

What is work? Physics definitions

By |2018-05-31T11:49:15+00:00August 17th, 2017|Physics|

Ancient Egyptian cattle plowing (Louvre Museum, Paris) You might think you know what work is, like homework, or having to pick up your room, right? But to scientists, work has a more definite meaning: work is force x distance. That means that you can measure work by measuring how much force, or energy, [...]

Levers – Simple machines – Physics

By |2018-05-31T11:49:33+00:00August 17th, 2017|Physics|

Levers: An orangutan child using a stick as a lever What is a lever? A lever is basically just a long stick that you push or pull against a fulcrum - a fixed object - to move something. A lever helps you move something heavy, or make something go fast. The earliest levers developed [...]