An object starts at 10 m/s and accelerates at 1 m/s^2 for 4 s. How far does it travel?
Answer and explanation
Correct answer: B. 48 m
- Step 1: d = ut + (1/2)at^2. Step 2. d = 10 x 4 + 0.5 x 1 x 4^2 = 48 m. Answer: 48 m. Why not the others: 56 m: this omits the factor 1/2. 14 m: this is the final speed, not a distance. 2 m: this does not square the time.
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