A car is traveling with uniform acceleration along a straight road. The road has marker posts every 100 m. When the car passes one post, it has a speed of 10 m/s and when it passes the next one, its speed is 20 m/s. What is the car's acceleration?
Correct answer: B. 1.5 m/s2
- A. 0.67 m/s2
- B. 1.5 m/s2
- C. 2.5 m/s2
- D. 6.0 m/s2
Explanation
A car is travelling with uniform acceleration along a straight road. The road has marker posts every 100 m, d = 100 m Initial speed of the car, u = 10 m/s Final speed of the car, v = 20 m/s Let a is the acceleration of the car. It is equal to the rate of change of velocity per unit time.
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