Including friction and gravity

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Presentation transcript:

Including friction and gravity Weight vs. Mass Including friction and gravity

Friction Friction is a force that opposes (goes against) motion. Ex. – tires on the road, sledding, rubbing your hands together. Friction

Gravity is an attractive force between objects that have mass.

Weight vs. mass Force due to gravity. S.I. unit = N Depends on location Changes based upon gravity g = w; g = w acc. due to g = 9.8 m/s2 (on Earth) w = mass x gravity w = mg Amt. of matter in an object. S.I. unit = g Does not depend on location If m increases, w increases If w increases, m may or may not increase (g Δ’s) Weight vs. mass