Question

D Question 10 1 pts You are driving on a straight road at exactly 26 miles per hour when you see a child run out in front of your car,chasing a ball. You push the brakes hard, which results in an acceleration of exactly-36000 miles/hour? The child freezes in panic and you cannot swerve to avoid the child because there are cars parked on both sides of the street. How many feet does your car travel before it comes to a complete stop? Your answer should be accurate to the nearest foot. (If you use equation 2.11 from the text to find the distance (X-Xo) in miles, you can use the fact that 1 mile - 5280 feet to find the distance in feet) Note: "Reaction Time" is the time it takes for a person to perceive something and respond to it. In this problem, your reaction time is the time it takes to see the child, realize you need to stop, move your foot to the brake pedal and push it. Although reaction time can have a profound effect on your driving and safety, it is too complex to model here. In this problem we will make a simplifying approximation that the reaction time is zero. So you should ignore reaction time in this calculation and consider only the motion and acceleration of the car.

Answer 1

Initial velocity = = 26 miles per hour : 26 milh acceleration - Q= - 36000 milh? sa distance covered covered by car before it complete stop- VE_Fibad relocity=0 milh (when it completey stop from equation of motion- r² = 4²+zas putting all the Comile/hour)² = (26mi/h)² + 2(-36000 mil/4²) يا لله valus- XS 26x26(michi? =(-2x3 6000 mile/4?) x3 Sa -26 x 26 2 X 36000 mile S: 9.388889 Xlo3 mile I mile= 5280 feet s=9.388889 X 103 x 5280 feet Sa 49.57 feet d Nearet feet will be su 50 feet