Answer:
Acceleration, 
Explanation:
We are given with a velocity-time graph of an object that starts from origin. y axis is velocity and x-axis is time.
The slope of velocity-time graph gives acceleration of an object. Taking the slope of this graph.

So, the acceleration of the object is
.
Answer:
Action and reaction forces don't cancel each other out because they act on separate objects. ... Action and reaction forces are always equal in magnitude, so it's not possible to exert more force on an object than it can exert back.
Explanation: