A runner in 120-m race constantly accelerates for the first 20 m. and then runs with a uniform velocity after. If the runner's time for the first 20 m is 3seconds. Determine: (a) his acceleration (m/s^2) (b) his final velocity (m/s) (c) his total time for the race (s).

A runner in 120-m race constantly accelerates for the first 20 m. and then runs with a uniform velocity after. If the runner's time for the first 20 m is 3seconds. Determine: (a) his acceleration (m/s^2) (b) his final velocity (m/s) (c) his total time for the race (s).

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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Distance and Speed

The speed, distance and time relation forms the basis of study of motion. You will need these concepts in the study of Mechanics. This concept is applicable for students who are studying the following courses –

Question

A runner in 120-m race constantly
accelerates for the first 20 m. and then runs
with a uniform velocity after. If the runner's
time for the first 20 m is 3seconds.
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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