Exploring the Forces of Nature
Discover the fundamental forces at play in our world, from gravity pulling everything toward the Earth to the resistance encountered in air and water. Learn about different states of matter like gas and liquid, and how forces can counteract each other to influence motion. Dive into the concepts introduced by Galileo Galilei and gain a deeper understanding of the intricate mechanisms governing our environment.
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Presentation Transcript
Forces A force is any push or pull on an object.
Gravity Gravity is the name for the force that pulls everything down toward the centre of the Earth.
Push The force that moves an object away from something.
Air resistance Air resistance is a type of friction between air and another material.
Water resistance Water resistance is a type of force that uses friction to slow things down that are moving through water.
Gas Gas is a state of matter that has no fixed shape and no fixed volume.
Liquid A substance that flows freely but is of constant volume
Counteracts Act against (something) in order to reduce its force
Dense Closely compacted in substance.
Galileo Galilei (1564-1642) Galileo di Vincenzo Bonaiuti de' Galilei was an Italian astronomer, physicist and engineer.
streamline(d) Having a form that presents very little resistance to a flow of air or water.
Opposing forces Forces that work against each other
Efficient A comparison of the energy output to the energy input in a given system.
Surface area Surface area is the measure of how much exposed area a solid object has.
Comparison The act of examining things to see if they are similar or different
Reducing resistance Two ways to reduce air resistance are stated: reducing the area in contact with air (by the cyclist ducking down or cycling behind someone else) and by being more streamlined (wearing smoother surfaces or a more streamlined helmet).
Machines Devices fulcrum/pivot Gears Cogs Direction Wheels Ramps Speed Force Wedges Levers Increase Decrease Screws Drive gear Pulleys Clockwise anti-clockwise
