Question 1188458
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<pre>

The pulling force (same as the tension of the rope) is the force, which

provides acceleration of the sled at 1.5 m/s^2.


According to the Newton's second law, the value of this force (its magnitude) is


    F = ma = 11 * 1.5 = 16.5 newtons.    <U>ANSWER</U>
</pre>

Solved.


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The given mass of the boy &nbsp;(42 kg) &nbsp;is an excessive info, &nbsp;irrelevant to the problem.