7. A car can accelerate at 4 m./sec.2. How long will it take to reach 90km./h. from rest?(ans.: 6.25)

Step 1:The equation of motion of car is given by,v=v0+atwhere,v is the final velocityv0 is the…

Answered: 7. A car can accelerate at 4 m./sec.2.…

Elements Of Electromagnetics

7th Edition

ISBN:9780190698614

Author:Sadiku, Matthew N. O.

Publisher:Sadiku, Matthew N. O.

ChapterMA: Math Assessment

Section: Chapter Questions

Problem 1.1MA

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2. A moving car, represented as a point, has a time-varying position given by z(t) = a +be² -ct and a time-varying velocity given by (1)=2b1²-6ct² where a = 2.17 m. b = 4.80 m/s², and c= 0.100 m/s. Find: (a) the car's average velocity from 2.00 to 10.0 s, (b) the car's average acceleration during the same interval. (c) the car's velocity at t = 5.0 s. (d) and the car's acceleration at the same time.
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A Flying toy for children starts from rest at the ground. Accelerate at 4 ft/sec? and then decelerate at 1.5 ft/sec?. Evalute the shortest time it takes to reach a hight 40 ft above the ground. The toy starts from rest and then stops.
$6
Subject: Dynamics of Rigid Bodies
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7. A car can accelerate at 4 m./sec.2. How long will it take to reach 90 km./h. from rest? (ans.: 6.25)