A train starts from rest and accelerates uniformly, until it has traveled 3.2 k

Question

A train starts from rest and accelerates uniformly, until it has traveled 3.2 km and acquired a velocity of 44 m/s. The train then moves at a constant velocity of 44 m/s for 430 s.. The train then slows down uniformly at 0.065 m/s2, until it is brought to a halt. The acceleration during the first 3.2 km of travel is closest to: A train starts from rest and accelerates uniformly, until it has traveled 3.2 and acquired a velocity of 44 The train then moves at a constant velocity of 44 for 430 . The train then slows down uniformly at 0.065 , until it is brought to a halt. The acceleration during the first 3.2 of travel is closest to: 0.36 m/s2 0.39 m/s2 0.33 m/s2 0.30 m/s2 0.27 m/s2 A train starts from rest and accelerates uniformly, until it has traveled 3.2 km and acquired a velocity of 44 m/s. The train then moves at a constant velocity of 44 m/s for 430 s.. The train then slows down uniformly at 0.065 m/s2, until it is brought to a halt. The acceleration during the first 3.2 km of travel is closest to: A train starts from rest and accelerates uniformly, until it has traveled 3.2 and acquired a velocity of 44 The train then moves at a constant velocity of 44 for 430 . The train then slows down uniformly at 0.065 , until it is brought to a halt. The acceleration during the first 3.2 of travel is closest to: 0.36 m/s2 0.39 m/s2 0.33 m/s2 0.30 m/s2 0.27 m/s2 A train starts from rest and accelerates uniformly, until it has traveled 3.2 and acquired a velocity of 44 The train then moves at a constant velocity of 44 for 430 . The train then slows down uniformly at 0.065 , until it is brought to a halt. The acceleration during the first 3.2 of travel is closest to: 0.36 m/s2 0.39 m/s2 0.33 m/s2 0.30 m/s2 0.27 m/s2 A train starts from rest and accelerates uniformly, until it has traveled 3.2 and acquired a velocity of 44 The train then moves at a constant velocity of 44 for 430 . The train then slows down uniformly at 0.065 , until it is brought to a halt. The acceleration during the first 3.2 of travel is closest to: 0.36 m/s2 0.39 m/s2 0.33 m/s2 0.30 m/s2 0.27 m/s2 A train starts from rest and accelerates uniformly, until it has traveled 3.2 and acquired a velocity of 44 The train then moves at a constant velocity of 44 for 430 . The train then slows down uniformly at 0.065 , until it is brought to a halt. The acceleration during the first 3.2 of travel is closest to: 0.36 m/s2 0.39 m/s2 0.33 m/s2 0.30 m/s2 0.27 m/s2 0.36 m/s2 0.39 m/s2 0.33 m/s2 0.30 m/s2 0.27 m/s2

Explanation / Answer

v^2 = v0^2 + 2 a x

44^2 = 2*a*3.2E3

a = 44^2/(2*3.2E3)=0.30 m/s^2

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