Post-UTME Physics 2011 Objective — Question 6
Question 6 of 10 from the Post-UTME Screening (Post-UTME) Physics 2011 Objective paper, with the correct answer and a full explanation.
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A car moving with a speed of 90km/hr was brought uniformly to rest by the application of the brakes in 10s. How far did the car travel after the brakes were applied?
- A. 125mCorrect
- B. 150m
- C. 250m
- D. 15km
Explanation
Initial speed=25m/s, decelerating uniformly to rest in 10s gives a=-2.5m/s². Distance=ut+½at²=25(10)-½(2.5)(100)=250-125=125m.
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