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The Liberator
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Thanks in advance guys, and it does not need to be treated as a high priority question.
This is not so much a homework question, as it is a query about a question that I am getting a wrong answer for (that is to the book's answer).
This is the straight question that the book gives me:
"A student supplies a constant force of 200 N at an angle of 60 degrees to the horizontal to pull a 50 kg object, initially at rest across a flat surface for 10 s. A constant frictional force acts on the mat, and the velocity after the 10 s is 3 ms-1"The question asks how much work is done on the mat by the student?
[tex]W = F * x * cosine (theta)[/tex]
I have substituted the values for cosine theta as 0.5, and F is 200 N, I tried to find the value for x, by using v * t = x, and substituted it as 3 * 10 = 30 m.
The answer that I found was 6 * 103 joules, and the book gave the answer as 1.28 * 103.
Homework Statement
This is not so much a homework question, as it is a query about a question that I am getting a wrong answer for (that is to the book's answer).
This is the straight question that the book gives me:
"A student supplies a constant force of 200 N at an angle of 60 degrees to the horizontal to pull a 50 kg object, initially at rest across a flat surface for 10 s. A constant frictional force acts on the mat, and the velocity after the 10 s is 3 ms-1"The question asks how much work is done on the mat by the student?
Homework Equations
[tex]W = F * x * cosine (theta)[/tex]
The Attempt at a Solution
I have substituted the values for cosine theta as 0.5, and F is 200 N, I tried to find the value for x, by using v * t = x, and substituted it as 3 * 10 = 30 m.
The answer that I found was 6 * 103 joules, and the book gave the answer as 1.28 * 103.
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