[Our setting finds us with Acceleration, the rate at which the velocity of an object changes per unit of time.  Acceleration has realized it is a vector, having both magnitude and direction, and is uniform if the rate of change of an object's velocity is the same over successive and equal time intervals.  Acceleration and V. W. are already engaged in heavy conversation as the curtain rises; V. W. is gesturing wildly.]

Velocity Withvectors:  If a large enough force is applied to an object, like a cart on a table, that object will move with an increasing velocity, or with you helping, Acceleration.  

Acceleration:  All right.  Let’s get something straight.  Speed is the time rate of change of motion.  You’re the speed in a particular direction.

Velocity Withvectors:  Right, right, a vector measurement, I need direction, man.

Acceleration: [Continuing with a smile.] But I heard Constant Speed was the same value of speed over a period of time, and Instantaneous Speed could be picked out at any time, that is, that it changes.

Velocity Withvectors:  [Arching a brow.] That’s true.  Uhm, did you hear I had many varieties, too?  Like, I could be positive, negative, constant, and variable?

Acceleration:  [Nods.]  Yep, I did.  And that you, changing, have the unit of m/s².

[Newton’s 1st Law of Motion runs into the room, as if it was  in a hurry to bring news to the two present components of motion.  The latter look up in surprise.]

1st Law:  [Out of breath.] Hey! If there is no net force acting on a body, it will continue in its state of rest or will continue moving along a straight line with uniform Speed.  I threw a ball into the air, and it continued upward until another force, gravity, pulled it down back to earth, with you, Acceleration, at 9.8 m/s2.

[V. W. and Newton’s 1st Law stare at Acceleration.   Just as 1st Law is finishing, Newton’s 2nd Law creeps up to the crowd, and murmurs as an afterthought.]

2nd Law:  [Quietly.] Well, the effect of an applied force is to cause the object to accelerate in the direction of the force.  Acceleration, here, is in direct proportion to the force and in inverse proportion to the mass of the object.  Your ball accelerated upward, 1st Law, because the force is pushing toward the hand that launched it. The amount of strength in that push determined how high the force could push the ball. 

[Speed Distance-Overtime finally enters, with four cups of Starbucks Coffee.]

Speed Distance-Overtime:  [Seeing the assembled components of motion deep in conversation, Speed frowns, crying out.]  Late again?!

[Curtain lowers.]