Forces, Forces Everywhere

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# Forces, Forces Everywhere - PowerPoint PPT Presentation

Forces, Forces Everywhere. An investigation of frictional forces around us. Forces. Newton’s 2 nd law: F=m*a Weight is an example of Force Gravity is an example of Acceleration Forces can be described by the direction in which the acceleration acts Forces acting on surfaces Normal Force.

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## PowerPoint Slideshow about ' Forces, Forces Everywhere' - alohilani-matthew

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Presentation Transcript

### Forces, Forces Everywhere

An investigation of frictional forces around us

Forces
• Newton’s 2nd law: F=m*a
• Weight is an example of Force
• Gravity is an example of Acceleration
• Forces can be described by the direction in which the acceleration acts
• Forces acting on surfaces
• Normal Force
“Nonconservative” Forces
• Friction
• Proportional to the normal force
• Exists for motionless and moving objects.
• Ff=μN
• Drag
• Proportional to velocity of fluid or object
• Fd=(½)ρv2CdA
• Density, velocity, drag coefficient, area
Purpose
• We will experiment with friction by examining the force needed to move two surfaces past each other, and analyze the force-position data to calculate frictional coefficient(s).
Hypothesis