Greg is in a bike race. at mile marker four (out of ten), his speed was measured at 13.5 mph. which best describes the measured
2 answers:
Answer:
it is the instantaneous speed of the bike rider.
Explanation:
First of all, let's remind the difference between speed and velocity:
- speed is a scalar, and it is the ratio between the distance covered and the time taken:
- velocity is a vector, which consists of a magnitude (the speed) and a direction as well.
The term 'instantaneous' means that the speed (or velocity) is measured at one precise instant of time, while the term 'average' means it is measured over a longer time period.
Based on all these definitions above, we can conclude that the correct answer is
it is the instantaneous speed of the bike rider.
Because in this problem, only the speed is given (no direction), so this is not a velocity, and also it is measured at one precise instant of time, so it is an instantaneous speed.
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Answer:
Explanation:
<u>Average Acceleration </u>
Acceleration is a physical magnitude defined as the change of velocity over time. When we have experimental data, we can compute it by calculating the slope of the line in velocity vs time graph.
Note: <em>We cannot see if the time axis is numbered in increments of 1 second, and we'll assume that. </em>
When , the graph shows a value of
When , the object is at rest,
We compute the average acceleration as