arti awnsers

Answers to Practice QuestionsBack to Questions

answer to question one is D


answer to question two is B

answer to question three: Fout/Fin = 80/50 = 1.6

answer to question four: WO= 600 x 2.5m =1500 J WI= 250 x 10 = 2500 J ME = WO/WI X 100% = 1500/2500 X 100% = 60 %

answer to question five: The other 40% of goes toward friction.