A driver in a moving car applies the brakes. The car slows to a final speed of 3.20 m/s over a distance of 40.0 m and a time interval of 9.25 s. The acceleration while braking is approximately constant. (a) What is the car's original speed before braking? m/s (b) What is its acceleration during this time? (The car's initial velocity is in the positive direction. Indicate the direction with the sign of your answer.) m/s²

College Physics
10th Edition
ISBN:9781285737027
Author:Raymond A. Serway, Chris Vuille
Publisher:Raymond A. Serway, Chris Vuille
Chapter2: Motion In One Dimension
Section: Chapter Questions
Problem 4CQ: (a) Can the equations in Table 2.4 be used in a situation where the acceleration varies with time?...
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A driver in a moving car applies the brakes. The car slows to a final speed of 3.20 m/s over a distance of 40.0 m and a time interval of 9.25 s. The acceleration while braking is approximately constant.
(a) What is the car's original speed before braking?
m/s
(b) What is its acceleration during this time? (The car's initial velocity is in the positive direction. Indicate the direction with the sign of your answer.)
m/s²
Transcribed Image Text:A driver in a moving car applies the brakes. The car slows to a final speed of 3.20 m/s over a distance of 40.0 m and a time interval of 9.25 s. The acceleration while braking is approximately constant. (a) What is the car's original speed before braking? m/s (b) What is its acceleration during this time? (The car's initial velocity is in the positive direction. Indicate the direction with the sign of your answer.) m/s²
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