Which of the following best defines instantaneous speed?
A. It is an object's speed at a specific point in time.
B. It is the speed of an object in a specific direction.
C. It is the total distance traveled over the total time.
D. It is a measure of how far an object moves in a certain time.
Answers
Answer:
A is correct
Explanation:
It is an object's speed at a specific point in time best defines instantaneous speed.
Explanation:
Instantaneous velocity definition is given as “The velocity of an object under motion at a specific point of time.”
It is determined very similarly as that of average velocity, but here time period is narrowed. We know that the average velocity for a given time interval is total displacement divided by total time. As this time interval approaches zero, the displacement also approaches zero. But the limit of the ratio of displacement to time is non-zero and is called instantaneous velocity.
The SI unit of instantaneous velocity is m/s. It is a vector quantity. It can also be determined by taking the slope of the distance-time graph or x-t graph.
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