# Gravity and Motion

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#### Storyboard Text

• Friction is a force that two surfaces exert on one another when they rub against one another.﻿
• ﻿The cause of friction is when irregular bumps on a surface rub against those of another surface
• “You know what? That is a great example of fluid friction. They are more types of friction such as sliding, rolling, static, and of course fluid.”
• “woohoo I can’t wait to go surfing”﻿
• gravity is the force pulls objects towards each other ﻿
• ﻿gravity
• ﻿the force of gravity depends on the mass of the object
• ﻿A type of fluid friction called air resistance acts on objects falling through air. Air resistance is an upward force exerted on falling objects.
• ﻿When the only force acting on an object is gravity, the object is said to be in free fall
• For every second an object falls, it accelerates 9.8 m/s.
• In free fall, the force of gravity alone causes an object to accelerate in the downward direction.
• ﻿Projectile is an object that is thrown
• Can mass be elastic?﻿
• ﻿Tension is an elastic force that stretches or pulls matter﻿
• Matter is considered elastic if it returns to its original shape after it is squeesed or stretched﻿
• ﻿Compression is an elastic force that squeezes or pushes matter together﻿
• ﻿Storyboard made by: Anthony Kaylani Simrat Jordyn & Mia Period 2
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