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Unformatted text preview: 3.0 X 10-1 3. The spring in a spring balance elongated by 2.4 cm when a weight of 3.9 N was hang on it. By how much would the spring elongate if a weight of 5.2 N were hanged from it? ( 8 pt ) (Use Hooks law) F = kx, k = 3.9 N / 2.4 cm = 1.625 N/cm x=F/k=5.2N/(1.625 N/cm) = 3.2 cm 4. Following data is to show the relationship between speed of a car and traveled distance. Assume the speed would be maintained at an initial value. (12 pts) time ( hour ) distance ( mile ) 1 70 2 140 3 210 4 280 5 350 a) Draw the graph (4pt) b) Find the proportional constant between time(x) and distance(y) (slope) (4pt). 70 mile/hour c) Express the relationship of time and distance in a mathematical formula (algebraic formula) (4pt). d= 70t...
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- Spring '08