Please help I’m stuck on this problem

9514 1404 393

Step-by-step explanation:

You recall the relation between speed, distance, and time is ...

  speed = distance / time

The graph is of distance vs. time. that means speed is the slope (distance/time) of the curve on the graph. If the slope is zero (a horizontal line), distance is not changing, and the speed is zero. That is, the vehicle has stopped.

If the slope is a positive constant, the vehicle is traveling at a constant speed.

If the slope is high, but becoming lower as the curve progresses left-to-right, then the speed starts high, but becomes lower: the vehicle is slowing down.

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The graphs, left-to-right, represent a vehicle that is ...

  traveling at constant speed

  stopped

  slowing down

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0.02

step-by-step explanation:

time of 9 192 631 770 periods of the radiation corresponding to the transition between the 2 hyperfine levels of the ground state of the caesium 133 atom at 0 k (but other seconds are sometimes used in astronomy)