Question: (a) We commonly say that friction opposes motion. Yet when we walk, the frictional force is in the direction of our motion (Fig. 4.17). Is

(a) We commonly say that friction opposes motion. Yet when we walk, the frictional force is in the direction of our motion (Fig. 4.17). Is there an inconsistency in terms of Newton€™s second law? Explain.

(b) What effects would wind have on air resistance?

Force exerted on ground Frictional force exerted on by footfoot by ground

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