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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-

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 * 10

**1. The problem statement, all variables and given/known data**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?

**2. Relevant equations**[tex]W = F * x * cosine (theta)[/tex]

**3. 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 * 10

^{3}joules, and the book gave the answer as 1.28 * 10^{3}.
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