Why doesn't the skateboarder roll as high each time she goes up the ramp
2 answers:
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Complete Question
The diagram for this question is shown on the first uploaded image
Answer:
The value is
Explanation:
From the question we are told that
The length of the stretcher is
The weight of the stretcher is
The weight for Wayne is
The distance of center of gravity for Wayne from Chris is
Generally taking moment about the first end where Chris is
=> upward moment
Here is the force applied by Jamie
Generally taking moment about the second end where Jamie is
=> downward moment
Generally at equilibrium , the upward moment is equal to the downward moment
=>
=>
Answer:
* the two plates of the same sign E = 0
* the two plates of different sign E/e = 2
Explanation:
In this exercise, the relationship between the field created by a plate and two infinite plates is asked.
The electric field created by each plate has the value of "e", which is related to the charge on the electric plate.
e =
If the plate is negative the electric field is directed towards the plate and if the plate is positive the electric field is directed out of the plate.
The test charge is always positive.
When we have two plates, we have several possibilities
* the two plates of the same sign
therefore the resulting electric field on the test charge is
E_total = e - e
E = 0
* the two plates of different sign
E_total = e + e
E = 2 e
the relationship between the two fields is
E/e = 2