An ice skater's mass is 5 Kg, she hits a wall with a force of 10 N. What was her acceleration?
2 answers:
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Answer:
1.117935:1
Explanation:
Since the wires are of the same material, they will have the same resistivity .
The cross-sectional area of the of a wire is given by;
where d is the diameter of the wire.
Also, the relationship between resistance R, cross-sectional area A and length l of a wire is given as follows;
Since the resistivity same for both wires, say wire 1 and wire 2, we can wreite the following;
Hence from eqaution (3), the ration of wire 1 to 2 is expressed as;
Given;
We then use equation (1) to fine the ratio of the area to
bearing in mind that
This ratio gives 0.8281. Substituting this into equation (5), we get the following;
Answer:
22.658 N
Explanation:
We can consider the Force as a sum of horizontal and vertical force vector components as mentioned in the graph,
Here the θ =25 degrees , F=25
Horizontal force =Fx
cos θ
