Hotmail, Outlook, 4-Bowie State University-PHX Movies 2/26/2018 06:00 PM C 58.8/

Question

Hotmail, Outlook, 4-Bowie State University-PHX Movies 2/26/2018 06:00 PM C 58.8/100 Grade Print 11 Calculator Periodic Table stion 15 of 26 Map Sapling Learning An simulated deer. The car is in contact with the faux fawn for 0.695 seconds, after which the car is measured to be traveling at 76.5 km/h. What is the magnitude of the acceleration of the car before the collision? motionless test car is accelerated uniformly to 145 krm/h in 7.98 seconds before striking a Number m i s What is the magnitude of the average acceleration of the car during the collision? Number m/ s begins moving until the collision is over? Number Next O Previous :.. ) Hint

Explanation / Answer

v = 145 x 1000 m / 3600s = 40.28 m/s

Applying vf = vi + a t

40.28 = 0 + 7.98 a

a = 5.05 m/s^2 ........Ans

during collision, vi = 40.28 m/s

vf = 76.5 x 1000 / 3600 = 21.25 m/s

21.25 = 40.28 + (0.695a)

a = - 27.4 m/s^2

Magnitude = 27.4 m/s^2 .....Ans

a = changein velocity / time

= (21.25 - 0) / (7.98 + 0.695 )

= 2.45 m/s^2 ......Ans

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