An Olympic-class sprinter starts a race with anacceleration of 4.50 m/s2. (a) What is her speed 2.40 slater? (b) Sketch a graph of her position vs. time for thisperiod.21. A well-thrown ball is caught in a well-padded mitt. If thedeceleration of the ball is 2.10×104 m/s2, and 1.85 ms(1 ms = 10−3 s) elapses from the time the ball firsttouches the mitt until it stops, what was the initial velocity ofthe ball?22. A bullet in a gun is accelerated from the firing chamber tothe end of the barrel at an average rate of 6.20×105 m/s2for 8.10×10−4 s . What is its muzzle velocity (that is, itsfinal velocity)?

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Description: An Olympic-class sprinter starts a race with anacceleration of 4.50 m/s2. (a) What is her speed 2.40 slater? (b) Sketch a graph of her position vs. time for thisperiod.21. A well-thrown ball is caught in a well-padded mitt. If thedeceleration of the

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College Physics

11th Edition

ISBN:9781305952300

Author:Raymond A. Serway, Chris Vuille

Publisher:Raymond A. Serway, Chris Vuille

Chapter1: Units, Trigonometry. And Vectors

Section: Chapter Questions

Problem 1CQ: Estimate the order of magnitude of the length, in meters, of each of the following; (a) a mouse, (b)...

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An Olympic-class sprinter starts a race with an
acceleration of 4.50 m/s²
. (a) What is her speed 2.40 s
later? (b) Sketch a graph of her position vs. time for this
period.
21. A well-thrown ball is caught in a well-padded mitt. If the
deceleration of the ball is 2.10×10⁴ m/s²
, and 1.85 ms
(1 ms = 10⁻³ s) elapses from the time the ball first
touches the mitt until it stops, what was the initial velocity of
the ball?
22. A bullet in a gun is accelerated from the firing chamber to
the end of the barrel at an average rate of 6.20×10⁵ m/s²
for 8.10×10⁻⁴ s . What is its muzzle velocity (that is, its
final velocity)?

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