A high performance sports car can go from 0 to 100 mph in 9.0 s. (Assume the car

Question

A high performance sports car can go from 0 to 100 mph in 9.0 s. (Assume the car travels in a positive direction. Indicate the direction with the sign of your answer) A. What is the cars average acceleration ( in SI units; meter-kilogram-second)? B. The same car can come to a complete stop from 35 m/s in 3.1 s. What is it's average acceleration? A high performance sports car can go from 0 to 100 mph in 9.0 s. (Assume the car travels in a positive direction. Indicate the direction with the sign of your answer) A. What is the cars average acceleration ( in SI units; meter-kilogram-second)? B. The same car can come to a complete stop from 35 m/s in 3.1 s. What is it's average acceleration? A. What is the cars average acceleration ( in SI units; meter-kilogram-second)? B. The same car can come to a complete stop from 35 m/s in 3.1 s. What is it's average acceleration? B. The same car can come to a complete stop from 35 m/s in 3.1 s. What is it's average acceleration?

Explanation / Answer

v1 = 0

v2 = 100*1.6*5/18 = 44.44 m/s

A) a_avg = (v2-v1)/t = (44-0)/9 = +4.94 m/s^2

B) a_avg = (v2-v1)/t = (0-35)/3.1 = -11.3 m/s^2

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