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Homework Help
Introductory Physics Homework Help
Find the minimum time required to go a given distance
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[QUOTE="phillyrand, post: 2549852, member: 226922"] [h2]Homework Statement [/h2] A sportscar, Fiasco I, can accelerate uniformly to 76 m/s in 30 s. Its maximum braking rate cannot exceed 0.60g. What is the minimum time required to go 1250 m, assuming the car begins and ends at rest? [h2]Homework Equations[/h2] a = v/t v = d/t = [tex]\Delta[/tex]r/t v[SUB]avg[/SUB] = (v[SUB]i[/SUB] + v[SUB]f[/SUB])/2 [when a is constant] [h2]The Attempt at a Solution[/h2] accelrate1 = (76m/s) / 30s = 2.53 m/s^2 accelrate2 = - (0.60)g = - (0.6)(9.8N/kg) = -5.88N/kg = -5.88 m/s^2 [B]r[/B][SUB]i[/SUB] = <0,0,0>m [B]r[/B][SUB]f[/SUB] = <1250,0,0>m [B]v[/B][SUB]i[/SUB] = <0,0,0>m/s [B]v[/B][SUB]f[/SUB] = <0,0,0>m/s I tried breaking it up into two parts, the first being the acceleration and the second being the deceleration, but I cannot seem to get the correct answer. [/QUOTE]
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Introductory Physics Homework Help
Find the minimum time required to go a given distance
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