Look carefully at the force applied right before the cups begin to slide and com

Question

Look carefully at the force applied right before the cups begin to slide and compare with the force applied as the cup is sliding at constant velocity. Is there a difference in the magnitude of forces? If so, explain. What can you conclude about the coefficients of friction (?s and ?k) using the equation Ff=?FN?

300 150 0.50 N 0.55 N 0.57 N 0.60 N 0.60 N avg 0.56 N plastic cupPlastic 125 g/ 1.25 N 300 150 1.35 N 1.50 N 1.48 N 1.49 N avg 1.41 N 0.50 N 0.45 N 0.55 N 0.50 N 0.50 N avg 0.50 N (100 ml) 0.90 N 0.80 N 0.90 N 0.75 N 0.85 N avg 0.84 N (200 ml) 0.30 N 0.25 N 0.25 N 0.35 N 0.30 N avg 0.29 N (50 ml) 0.50 N 0.55 N 0.45 N 0.50 N 0.55 N avg 0.51 N (100 ml) paper cup 200 ml and 100ml foam

Explanation / Answer

apply rfrictional Force F = u N

where N is normal force

Ff for cups = 1.35 *0.55 = 0.7425 N

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