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somedudeontheIn
06.10.2019 •
Physics
Use the graph above to determine the change in speed of the object between 20 and 30 seconds?
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Ответ:
Explanation:
The attached figure shows the acceleration time graph of an object. We known that the slope of the a-t graph gives the velocity of an object. The area under the a-t graph gives the velocity of object.
In x axis, time t = 30 s- 20 s = 10 s
In y axis, acceleration,![a = 6 - 0=6\ m/s^2](/tpl/images/0292/5828/5f0bb.png)
Area under the graph from 20 to 30 seconds is given by :
v = 30 m/s
So, the change in speed of the object is 30 m/s. Hence, this is the required solution.
Ответ:
6 m/s
Explanation:
To determine the change in speed of the object, we just need to determine its speed at t = 30 s and at t = 20 s, and then calculate the difference.
The speed at t = 30 is:
v = 6 m/s
While the speed at t = 20 s is:
u = 0
Therefore, the change in speed is:
Ответ:
Electrons are the negatively charged particles of atoms.
Explanation:
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