Problem 1.50 - Problem 1.50 [Difficulty: 3] Given: Lateral...

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Problem 1.50 [Difficulty: 3] Given: Lateral acceleration, a = 0.70 g, measured on 150-ft diameter skid pad; Uncertainties in Path deviation ±2 ft; vehicle speed ±0.5 mph Find: Estimate uncertainty in lateral acceleration; ow could experimental procedure be improved? Solution: Lateral acceleration is given by a = V 2 /R. From Appendix F, uu u av R + [( ) ( ) ] / 2 22 1 2 From the given data, s ft 1 . 41 ft 75 s ft 2 . 32 70 . 0 ; 2 2 = × × = = = aR V aR V Then u V V mi hr s 41.1 ft ft mi hr 3600 s v × × × δ 05 5280 0 0178 .. and u R R 2ft ft R × 1 75 00267 . so u u percent a a × + (.) ( .) . . / 2 0 0178 0 0267
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