A vehicle is traveling in the +x direction to x = 100 m. It then reverses...
A vehicle is traveling in the +x direction to x = 100 m. It then reverses direction. At the instant when it changes direction, the velocity of the vehicle is
A. positive.
B. negative.
C. zero.
D. positive then negative
.E. negative then positive.
EXPLAIN PLEASE!!!
Homework Answers
Initially, when the vehicle is travelling in a +x direction, the velocity is positive.
However, at the instant when the vehicle reverses direction, that is, it started moving in -x direction. Now, the velocity changes from "positive to negative".
This is because we are taking the velocity as negative toward the -x direction.
You can also choose the conventions according to your needs, but here according to the question, the answer is,
"Positive then Negative"
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