MasteringPhysics: MODULE #7 https: https://session.masteringphysics.com/myct/ite
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Question
MasteringPhysics: MODULE #7 https: https://session.masteringphysics.com/myct/itemView?assign smentProblemiD-4721992 Yahool Upgrade If You Are A.j Chegg.com Sailtrain: N.round (SOG)Le COLLEGE PHYSICS I ONLINE Signed in as erle scianna He Problem 7.18 Resources e previous | 7 of 7 | return to assig You are the design engineer in charge of the crashworthiness of new (32 mph automobile models. Cars are tested by smashing them into fixed, massive barriers at 52 km/h ). A new model of mass 1900 kg takes 0.16 s from the time of impact until it is brought to rest. Part A Calculate the average force exerted on the car by the barrier Express your answer using two significant figures. Submit My Answers Give Up Incorrect; Try Again; 9 attempts remaining Part B Calculate the average deceleration of the car Express your answer using two significant figures.Explanation / Answer
given :- the car is moving at 52kmph = 52*5/18 = 14.44 m/s
mass of the car =1900kg
time taken for the car to stop = 0.16s
using the motion of equation
v = u + at
0 = 14.44 + a(0.16)
a = -14.44 / 0.16 =-90.28 m/s2
Force = mass * acceleration
F = 1900* 90.28
F= 171527.78 N
a) average force = 171527.78 N
b) average acceleration = 90.28 m /s2