*If you answer this I will rate you 3 times at a five star level just put in the
ID: 2173158 • Letter: #
Question
*If you answer this I will rate you 3 times at a five star level just put in the same answer 3 times so that I can rate it.*Suppose you are told that a vehicle undergoes a constant acceleration over level ground for a period of time. If you were to develop a model for this situation, it would not be appropriate to say that you are assuming no friction or air resistance. Why not? Assuming a certain initial position would be unnecessary. Why? Give an example of a good assumption.
I need a DETAILED answer for this, I will only rate the answer based on the quality and elaboration of your explanation.
Explanation / Answer
A)If you do not consider the air resistance or the frictional force you will miss out on the work that the vehicle does against air resistance or the frictional force. Say the vehicle moves in an uniform velocity . Then Power of the engine =F.V . Now F= Opposing forces .Here if u dont consider air resistance or the frictional force F will be zero . So power delevered by the engine =0!!! When it is wrong .. also , air resistance or the frictional force developes retardation in the motion direction . So u will miss out on that retardation too... B)Assuming a certain initial position would be unnecessary. because if u consider a certain position as initial position , in calculation of displacement u need to substract it from position at time t . Calculating velocity v=(S-S0)/t like that . So eventually u will have to substract it from s(t) . So why put a S(0) to make ur calculation unnecessarily complicated ?
Related Questions
Navigate
Integrity-first tutoring: explanations and feedback only — we do not complete graded work. Learn more.