The jet car is originally traveling at a velocity of 10 m/s whon it is subjected

Question

The jet car is originally traveling at a velocity of 10 m/s whon it is subjected to the acceloration shown. When t0.s 0 Suppose that a, 55 m/s 2-35 m/s and t" 15 s. (Figure 1) Part A Dotermine the cars maximum velocity Express your answer to three significant figures and include the appropriate units. Correct Part B Figure 1of1 Determine the time t' when the car stops Express your answer to three significant figures and include the appropriate units. Submt Previosus Answers Request Answer t (s) X Incorrect; Try Again; 5 attempts remaining

Explanation / Answer

Maximum velocity of car will be till the acceleration is positive that is till t=15sec

v = u + a*t

v = 10 + 5.5*15 = 10 + 90 = 92.5 m/s

Final velocity ( t= 15 to t=t')

v = u + a*(t' - 15)

0 = 92.5 + -3.5*(t' - 15)

92.5 = 3.5*t' - 3.5*15

t' = 41.42sec

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