Physics 101: Exam II ne/Pledge Hbcna nbera lienpen- 3/16/2018 You must show all

Question

Physics 101: Exam II ne/Pledge Hbcna nbera lienpen- 3/16/2018 You must show all work to receive full credit! A small car, a Fiat 500 (1100 kg) , collides head-on with a large car, a Cadillac Escalade 2000 no injuries!). During the collision the Cadillac exerts a 5500 N lonce on the Fia What force does the Fiat exert on the Cadillac? Justify your answer Don't won these matter e size ortnu obects tne we exerted by eoch ooect will be te sau,but ppsite ) What is the acceleration of the Fiat? The Cadillac? abou lI0O1100 conclude that both its acceleration and its velocity are zero? Explain. e 2. If the net forc e on a body is zero can you ude this becouse i there are nonet e we an concl ss acting n ec, vel hy and ourelerad iun on)ect, tuveloiy and oceler ot tun acting n +hu are quna to e ot two ing to loe at uuo hr trnsion in the cable suppot

Explanation / Answer

1. (a) Force will be equal and will be in opposite direction from Newton's third law of motion, F (Fiat on cadillac) = 5500 N

(b) aFiat = F/mFiat = 5500/1100 = 5 m/s2

aCadillac = F/mCadillac = 5000/2600 m/s2 = 1.923 m/s2

2. If the net force is zero on a body then the acceleration of the body will be zero from Newton's second law of motion but the velocity will not be necessarily zero. It will remain unchanged.

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