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A bus starting from rest moves with a uniform acceleration of ... - Science
Question
A bus starting from rest moves with a uniform acceleration of 0.1 \text{ m s}^{-2} for 2 \text{ minutes}. Find (a) the speed acquired, (b) the distance travelled.
Answer
Given:
Initial velocity (u) = 0
Acceleration (a) = 0.1 \text{ m/s}^2
Time (t) = 2 \text{ min} = 120 \text{ s}
(a) Speed acquired (v):
v = u + atv = 0 + (0.1 \times 120)v = 12 \text{ m/s}
(b) Distance travelled (s):s = ut + \frac{1}{2}at^2s = (0 \times 120) + \frac{1}{2} \times 0.1 \times (120)^2s = 0.05 \times 14400s = 720 \text{ m}