A runner in 140-m race constantly accelerates for the first 40 m. and then runs with a uniform velocity after. If the runner's time for the first 40 m is 5 seconds. Determine: (a) his acceleration (m/s^2) (b) his final velocity (m/s) (c) his total time for the race (s).

A runner in 140-m race constantly accelerates for the first 40 m. and then runs with a uniform velocity after. If the runner's time for the first 40 m is 5 seconds. Determine: (a) his acceleration (m/s^2) (b) his final velocity (m/s) (c) his total time for the race (s).

University Physics Volume 1

18th Edition

ISBN:9781938168277

Author:William Moebs, Samuel J. Ling, Jeff Sanny

Publisher:William Moebs, Samuel J. Ling, Jeff Sanny

Chapter3: Motion Along A Straight Line

Section: Chapter Questions

Problem 84AP: Unreasonable Results A cyclist rides 16.0 km east, then 8.0 km west, then 8.0 km east, then 32.0 km...

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Answer the ff

A runner in 140-m race constantly
accelerates for the first 40 m. and then runs
with a uniform velocity after. If the runner's
time for the first 40 m is 5 seconds.
Determine:
(a) his acceleration (m/s^2)
(b) his final velocity (m/s)
(c) his total time for the race (s).

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