Construct a position-time graph that shows the forward progress of Sunny The Dog in a straight line for 20 meters over the cours
e of 4 seconds.
1 answer:
Answer:
The answer to your question is the second graph (the one attached).
Explanation:
We have to look for the graph that represents the data given.
a) The first graph is not correct because we look for a distance of 20 m, and this graph only goes from 0 to 10 m.
b) this graph is correct because it covers the distance (20 m) and the time (4 s)
c) This graph could be the right ooption but it is coming back and we look for a forward progress, then this graph is incorrect.
d) This graph shows that the dog is not moving, so this option is wrong.
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Answer:
vector with direction equal to the axis X.
Explanation:
We use the Gauss Law and the superposition law in order to solve this problem.
<u>Superposition Law:</u> the Total Electric field is the sum of the electric field of the first infinite sheet and the Electric field of the second infinite sheet:
<u>Thanks Gauss Law</u> we know that the electric field of a infinite sheet with density of charge σ is:
Then:
This electric field has a direction in the axis perpendicular to the sheets, that means it has the same direction as the axis X.