When is velocity decreasing

Therefore speed is increasing in section A. There may be different opinions about whether to say velocity is increasing in a case like section D. Velocity in section D is negative but is changing to be less negative -- heading toward the positive velocity territory.

I say that is not an increase, but some might consider that since it is a velocity change in the positive direction it is therefore an increase.

You might want to consider what has been said in class about that conflict. When are the speed and velocity of this object increasing? Daniel H. Feb 7, Sections A, C, and E. Explanation: Speed increases when velocity and acceleration have the same sign. Section D, negative velocity, positive slope, so decreasing speed.

Section E, both velocity and slope are positive again. If the distance remains constant, then the velocity will be zero on such an interval of time. Likewise, a positive acceleration implies that the velocity is increasing with respect to time, and a negative acceleration implies that the velocity is decreasing with respect to time. If the velocity remains constant on an interval of time, then the acceleration will be zero on the interval.

How high above the ground will the object reach? FALSE since a negative velocity would be a line in the negative region i. Physics Tutorial. My Cart Subscription Selection. Student Extras. Time Graphs. FALSE since there is an acceleration i.

TRUE since the line is approaching the 0-velocity level the x-axis. FALSE since the line never crosses the axis. FALSE since the line is not moving away from x-axis. FALSE since the line has a negative or downward slope. TRUE since the line is straight i. We Would Like to Suggest Sometimes it isn't enough to just read about it.

You have to interact with it! And that's exactly what you do when you use one of The Physics Classroom's Interactives. We would like to suggest that you combine the reading of this page with the use of our Graph That Motion or our Graphs and Ramps Interactives.

Each is found in the Physics Interactives section of our website and allows a learner to apply concepts of kinematic graphs both position-time and velocity-time to describe the motion of objects. Time Graphs » Meaning of Shape for a v-t Graph.