A car can accelerate at 4 m./sec.. How long will it take to reach 90 (ans.: 6.25) km./h. from rest ?

Elements Of Electromagnetics
7th Edition
ISBN:9780190698614
Author:Sadiku, Matthew N. O.
Publisher:Sadiku, Matthew N. O.
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A car can accelerate at 4 m./sec. . How long will it take to reach 90
km./h. from rest ?
(ans.: 6.25)
An express train reducing its velocity to 40 km./h. , has to apply
the brakes for 50 sec.. If the retardation produced is 0.5 m./sec.
find its initial velocity in km./h..
(ans.: 130)
At the instant from which time is measured a particle is passing
through O and traveling towards A , along the straight line OA. It
is s m. from O after t sec. where s=t (t– 2):
i) when is it again at 0?
ii) when and where is it momentarily at rest ?
iiil what is the narticle's areatest dienlacement from 0. and how
41 1 73/ 151
目月日非 128.15%
Transcribed Image Text:A car can accelerate at 4 m./sec. . How long will it take to reach 90 km./h. from rest ? (ans.: 6.25) An express train reducing its velocity to 40 km./h. , has to apply the brakes for 50 sec.. If the retardation produced is 0.5 m./sec. find its initial velocity in km./h.. (ans.: 130) At the instant from which time is measured a particle is passing through O and traveling towards A , along the straight line OA. It is s m. from O after t sec. where s=t (t– 2): i) when is it again at 0? ii) when and where is it momentarily at rest ? iiil what is the narticle's areatest dienlacement from 0. and how 41 1 73/ 151 目月日非 128.15%
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