A man is driving his sports car down a four-lane highway at 40 m/s. He comes up behind a slow-moving dump truck and decides to pass it in the left-hand lane. If Nathaniel can accelerate at 5m/s², how long will it take for him to reach the speed of 60 m/s²?
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Answer:
Just use the definition of acceleration.
Time required
= (Speed change)/(acceleration)
= (20 m/s)/(5 m/s^2) = 4 s