4 Britnee is texting and driving in her passenger car when she looks up and realizes that a big rig is fully stopped 16 meters from her on the road ahead. Her speed is shown. Britnee is a quick texter and fortunately also has a quick reaction time. Assume she hits the brakes immediately and manages to come to a stop just 1.5 meters from the rear of the big rig (her acceleration is constant). A) What was Britnee's acceleration while braking? Express your answer in SI units and also in “g's" (acceleration as a fraction of free fall acceleration). B) Now consider what would happen if her initial speed were only 25% greater than before. With the same acceleration you calculated in A, would Britnee collide with the truck? If so, how fast would her car have been moving at the moment of collision? C) What was Britnee's mistake in this situation? (this answer is not-for-credit)

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Chapter3: Motion Along A Straight Line
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Britnee is texting and driving in her passenger car when she looks up and
realizes that a big rig is fully stopped 16 meters from her on the road ahead. Her
speed is shown. Britnee is a quick texter and fortunately also has a quick reaction
time. Assume she hits the brakes immediately and manages to come to a stop just
1.5 meters from the rear of the big rig (her acceleration is constant).
A) What was Britnee's acceleration while braking? Express your answer in SI
units and also in “g's" (acceleration as a fraction of free fall acceleration).
B) Now consider what would happen if her initial speed were only 25% greater
than before. With the same acceleration you calculated in A, would Britnee collide
with the truck? If so, how fast would her car have been moving at the moment of
collision?
C) What was Britnee's mistake in this situation? (this answer is not-for-credit)
vo = 15 m/s
Ax = 16 meters
Transcribed Image Text:Britnee is texting and driving in her passenger car when she looks up and realizes that a big rig is fully stopped 16 meters from her on the road ahead. Her speed is shown. Britnee is a quick texter and fortunately also has a quick reaction time. Assume she hits the brakes immediately and manages to come to a stop just 1.5 meters from the rear of the big rig (her acceleration is constant). A) What was Britnee's acceleration while braking? Express your answer in SI units and also in “g's" (acceleration as a fraction of free fall acceleration). B) Now consider what would happen if her initial speed were only 25% greater than before. With the same acceleration you calculated in A, would Britnee collide with the truck? If so, how fast would her car have been moving at the moment of collision? C) What was Britnee's mistake in this situation? (this answer is not-for-credit) vo = 15 m/s Ax = 16 meters
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