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homework 4 - homework 04 NOORANI ZOHEB Latest unpenalized...

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homework 04 – NOORANI, ZOHEB 1 Latest unpenalized work: Jan 25 2008 Friday 04:00 (after this date you can not make a perfect score). Work cutoff: Jan 26 2008, 4:00 am. Question 1, chap 2, sect 4. part 1 of 1 10 points A car is moving at constant speed on the freeway. The driver sees a patrol car at time t 1 and rapidly slows down by around 10 miles per hour. After continuing at this speed for a few minutes, the driver at time t 2 returns to the earlier constant speed. Let us plot the acceleration of the car as a function of time; take the forward direction of motion as positive. Which of the following graphs correctly describes the car’s accelera- tion a ( t )? 1. t 1 time 0 0 a t 2 2. t 1 time 0 0 a t 2 3. t 1 time 0 0 a t 2 4. t 1 time 0 0 a t 2 5. t 1 time 0 0 a t 2 6. t 1 time 0 0 a t 2 7. t 1 time 0 0 a t 2 8. t 1 time 0 0 a t 2 Question 2, chap 2, sect 4. part 1 of 1 10 points A record of travel along a straight path is
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homework 04 – NOORANI, ZOHEB 2 as follows: (a) Start from rest with constant accelera- tion of 2 . 97 m / s 2 for 15 . 4 s;
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