. Which of the following is a vector describing how fast an object moves over a long time interval?. . average speed. instantane
2 answers:
By definition we have to:
The average velocity is that velocity in a given time interval. It is calculated by dividing the displacement by the elapsed time, according to the following formula:
We must remember that the average velocity is a vector. Therefore, it has magnitude and direction.
Answer:
The following is a vector describing how fast an object moves over a long time interval:
average velocity
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Answer: The velocity at different marked time points are given as
t1 = -
t2 = +
t3 = +
t4 = -
t5 = 0
Explanation:
The slope of the tangent of the curve indicates the instantaneous velocity. So if the slope of the tangent is positive, that Is, the tangent makes a positive angle (above the horizontal axis) with the horizontal
axis, then the velocity at this point is positive, and if the slope of the tangent is negative, that is the tangent makes a negative angle with the horizontal axis (below the horizontal axis), then the velocity at this point is negative.
When the tangent of the line is parallel to the horizontal axis, the velocity is 0.
From the position-time graph attached, the sign on the instantaneous velocity for each time marked on the graph is given below
t1 = -
t2 = +
t3 = +
t4 = -
t5 = 0
QED!
