Question

(20 points) A car starting from rest travels 220 m in 9.4 seconds with a constant acceleration. It then travels at a constant speed for another 12 seconds. After that, the brakes are applied and the car comes to rest an acceleration of 6.5 m/s2.

1. A) Draw the motion diagram for the entire trip.

2. B) What direction is the acceleration when the car is coming to rest?

3. C) List all known variables with their values.

4. D) What is the acceleration in the first phase of the trip?

5. E) What it the velocity at the end of the acceleration period?

6. F) How far does the car travel at a constant speed?

7. G) How far does the car travel while it is braking?

Answer 1

velocity- hi me oph The AX 12c 3140여→t . when the ca ia coming torest, accelexaion is direc hen ogposite to the divechon of mohon od the cas. cini hal velo city uzom/s cistams avetled first phase s 22om first phase = 9-4zecs time taken in Hime taken in the econd phase 2 etardahon inthe thid phase 6 5m/s final velouy oms 2 Sutat 2arl4) 2X220 a 2 4.97 9 m/s 4) e vutat 0t 4.979x9-4 46 8 mys distana coveud in 2ndhase (4s.e) 561m

-2as 0-と 2as @S-u-46-3) 2168-54 2a 2x6.5