99% pt 100% 100% Master ingphysics: Forces 5 Hw post Test Google Chrome Secure h
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99% pt 100% 100% Master ingphysics: Forces 5 Hw post Test Google Chrome Secure https://session masteringphysics com myct itemView? ssiarnentPro en ID-81465716 Forces 5 HW Post Tst Problem 4.97 previcus 12 of 25 next Problem 4.97 Part A A child is riding in a child-restraint chair, securely fastened to the seat of a car Assume the car has speed 47 km/h when it hits a tree and is brought to rest in 0.20 s. The mass ot the child is 14 kg (Figure 1) Assuming constant deceleration during the collision, estimate straps of the restraint chair exert on the chid to hold her in the chair the net horzantaí force F hat the e appropriate units. Enter initial velocity and positive value if the direction of the force is in the direction of the negative value if the direction of the force is in the direction opposite to the initial w Submit My Answers Give Up Incorrect; Try Again; 4 attempts remaining Continue FigureExplanation / Answer
v = 47 km/h = 47*1000/3600 = 13.05 m/s
acceleration a = v/t = -13.05/0.2 = -65.28 m/s^2
from newton's second law
f = ma = -14*65.28 = -913.9 N
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