leeorareeves299
06.01.2022 •
Physics
A car increases its velocity uniformly from 20m/s to 40m/s in 2 minutes. Can you solve for its average velocity?
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Ответ:
Explanation:
If velocity is increasing uniformly with time, this means the acceleration is constant. So we can use this formula,
Initial Velocity+Final Velocity/2.
Our total Velocity is 60 m/s. Let convert minutes to seconds, which is 120 seconds so we get
60m/s/120 s which we get 0.5 m/s.
Average velocity is 0.5 m/s^2.
Ответ:
The speed at the beginning is 20 m/s.
The speed at the end is 40 m/s.
The average speed is 1/2(20 m/s + 40 m/s)
That's 30 m/s .
The length of time for the change doesn't matter, as long as the change is uniform.
Ответ:
A=48 CM2
Explanation:
A=9 X 10
A=90 CM2 9-2=7
A=6 X 7
A=42 CM2
A=90-42
A=48CM2