Consider the motion of a train. Which of the following is correct? Assume that t
ID: 2178004 • Letter: C
Question
Consider the motion of a train. Which of the following is correct? Assume that the positive direction is to the right. The train car is moving very fast from left to right, but it eventually stops. a- is positive, Delta v is negative. The train car is moving very fast from right to left, but it eventually stops. a- is negative; Delta v is positive. The train car is moving very fast from right to left, but it eventually stops then moves at a constant, fast speed from left to right. It is impossible to know if a- is positive or negative without more information; Delta v is positive. None of these are correct.Explanation / Answer
a) a is negative; b) a is positive; c) dv is negative. Hence, none of these are correct.