Part1: Questions 1-3 are considered fundamental problems. They are at the level
ID: 1863571 • Letter: P
Question
Part1: Questions 1-3 are considered fundamental problems. They are at the level of a mid advanced exam question. Most of these questions are from previous exams. Speed vs time for 2008 Z06 Corvette 1. The graph to the right shows the speed as a function of time for a corvette as it accelerates from rest to its top speed of about 202 mph on a straight horizontal road. 200 a. About how many 0 seconds does it take this corvette to go from 0 mph to 60 mph. Speed in 1st gear -Speed in 2nd e" -Speedin 3rd gear Speed in 4th gear Speed in Sth gear 100 b. About what percentage of the total time does the corvette spend in each gear? S0 c. Estimate the 10 20 30 40 50 60 70 average acceleration in 1st gear What is the speed of the corvette at 11 seconds? Estimate the total distance the corvette travels from its starting location to the location when it reaches the top speed (end of curve). time (seconds d. e.Explanation / Answer
(a)As seen from the graph ,60 mph is at t=3 sec
(b)total time =60 sec
time in 1st gear=3sec percentage=5%
time in IInd gear=3 percentage=5%
time in IIIrd gear=4 sec percentage=6.67%
time in IVth gear=8sec percentage=13.33%
time in Vth gear=42 percentage=70%
(c)Average accleration=change in velocity/change in time=26.8224/3=8.94 m/s^2
(d)At 11 sec,speed=130 mph
(e)Distance travelled=Area of v-t graph=21*50*10=10000mph*sec=2.78 mile