b.) absolute threshold
A) Has a positive acceleration and is speeding up.
B) Moving with zero acceleration.
C) Moving at a constant acceleration.
D) Has a negative acceleration and is slowing down.
B) Moving with zero acceleration.
Explanation:
Acceleration is defined as the rate of change of the velocity per unit time:
In a velocity-time graph, this ratio corresponds to the slope of the curve. In fact:
(change in velocity) corresponds to the increase in the y-axis
(change in time) corresponds to the increase in the x-axis
So, acceleration corresponds to the slope of the curve in a velocity-time graph. For cart C, the slope is zero, therefore the acceleration is also zero.
Answer:
B) Moving with zero acceleration.
Explanation:
As we can see the graph for Cart C that its velocity is constant and not changing its magnitude as well as its sign
So here the magnitude and direction is constant so we can say that velocity will remain constant always.
Where we can define the acceleration as
so here if magnitude and direction both are constant so
so we can say that acceleration of cart C is ZERO
so correct answer will be
B) Moving with zero acceleration.