A car accelerates uniformly from rest at 2.0 m/s² for 8.0 s. What is the total distance traveled by the car during this time?
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Correct answer
C. 64 m
Principle or equation
For uniformly accelerated motion starting from rest, displacement is given by s = ½ a t².
Why this answer is correct
Given a = 2.0 m/s² and t = 8.0 s, s = ½ × 2.0 × (8.0)² = 1.0 × 64 = 64 m.
Example
A runner accelerates from rest at 1.5 m/s² for 4.0 s, covering ½ × 1.5 × 16 = 12 m.
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