2. The car's brakes and tires provide up to 12.7 m/s² of deceleration on a dry road. How long will it take to slow down from 60mph to 30mph if the driver jams on the brakes?

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Chapter1: Units, Trigonometry. And Vectors
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2. The car's brakes and tires provide up to 12.7 m/s² of deceleration on a dry road. How long will it take
to slow down from 60mph to 30mph if the driver jams on the brakes?
3. A particle's position along the x-axis as a function of time is given by x(t) = 7.0- 12t + 2.5t²
where x is in meters and t is in seconds.
a) Determine this particle's initial position, its initial velocity, and its acceleration. You can compare it to
a kinematics equation or simply use calculus.
Transcribed Image Text:2. The car's brakes and tires provide up to 12.7 m/s² of deceleration on a dry road. How long will it take to slow down from 60mph to 30mph if the driver jams on the brakes? 3. A particle's position along the x-axis as a function of time is given by x(t) = 7.0- 12t + 2.5t² where x is in meters and t is in seconds. a) Determine this particle's initial position, its initial velocity, and its acceleration. You can compare it to a kinematics equation or simply use calculus.
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