Question

You're driving down the highway late one night at 15 m/s when a deer steps onto the road 42 m in front of you. Your reaction time before stepping on the brakes is 0.50 s , and the maximum deceleration of your car is 11 m/s^2 .

1.

How much distance is between you and the deer when you come to a stop?

Express your answer using two significant figures.

2.

What is the maximum speed you could have and still not hit the deer?

Express your answer using two significant figures.

Answer 1

0 = u2 + 2* (-11) * 34.5 u2 = 759 u = 27.5499 m/s u = 28 m/s ( two significant figure)

hence , maximum speed you could have and still not hit the deer is 28 m/s

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