3.2 Weight, Gravity, and Friction

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Presentation transcript:

3.2 Weight, Gravity, and Friction How does increasing the mass of the car affect its acceleration?

Key points Gravity Weight Definition Formula Friction Cause Types

Gravity Force that pulls every mass toward every other mass. Downward force Depends on mass Less on Mars More on Earth 9.8 m/sec2

Weight Force created by gravity on an object Changes with location Formula If you have… And you need… Fw = mg Mass and gravity Weight m = Fw / g Weight and gravity Mass g = Fw / m Weight and mass Gravity

Friction Forces caused by motion between objects (microscopic hills and valleys) Work against motion that produces them Reduces acceleration All machines have Types: Air Viscous Sliding Rolling