A 2.0 kg box is pulled along a frictionless, horizontal surface by a force that makes an
angle of 30 degrees with the ground. If the box is pulled a distance of 4.0 meters and
changes speed from 1.0 m/s to 3 m/s, what was the magnitude of the force on the box?
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Ответ:
13.8 N
Explanation:
The magnitude of the resultant is 13.8 N
Direction is given by
The angle of the resultant is![41.44^{\circ}](/tpl/images/0930/5241/54586.png)