When is particle speeding up slowing down

Thank you. Dec 3, Lexington, MA. Hello, OrangeT! Find when the particle is speeding up and slowing down. Dec 7, 2, Colombia. I think the OP was correct with his intervals. Between each stop, the particle must both speed up and slow down. You have it doing only one of these. This is a non-directional measure. Here's the graph. From that is it obvious where the particle is speeding up and where it is slowing down.

Ok, so I am still a little bit confused. However, wouldn't you also be solving acceleration for zero to find the x intercept of 1. Then if you take test numbers greater and less than 1. Doesn't this mean we have to consider this into our intervals of speeding vs. I am sorry if it is a foolish question. I must be missing something still. It's not. You were correct. Reactions: 1 person. Active 2 years ago. Viewed k times. Miguel Miguel 7 7 gold badges 10 10 silver badges 18 18 bronze badges.

Add a comment. Active Oldest Votes. Now check where the signs match. Cameron Buie Cameron Buie It took me some time It slows down. Ron Gordon Ron Gordon k 16 16 gold badges silver badges bronze badges. It goes from slowing down velocity decreasing to speeding up velocity increasing. During this time, the velocity is negative.

Usually "speeding up" means that the absolute value of the velocity increases, not that its signed value in some arbitrarily chosen orientation of a coordinate system does. In my physics education, this informality in the language was typical.

My point is that you're assigning a wrong, unnatural, unusual semantics to the terms in the word problem. If you have two cars moving along the highway, one towards the north and the other towards the south, and both drivers slam the brakes, would you really say that one of the cars will be "speeding up" while the other "slows down", until each comes to a complete halt? Show 2 more comments. Emily Emily 1. Why would sketching the curve again help?

Moreover, the answer as a whole doesn't really clarify anything. Sign up or log in Sign up using Google. Sign up using Facebook. Sign up using Email and Password. Post as a guest Name. Email Required, but never shown. Upcoming Events. Featured on Meta. Now live: A fully responsive profile.