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Example Questions
Example Question #2 : Other Force Fundamentals
You and your friend are pushing on a box with a force parallel to the ground of 40 N. The box weighs 5 kg, and the coefficient of kinetic friction between the box and the ground is 0.75. What is the net force on the box in the horizontal direction?
Possible Answers:
Correct answer:
Explanation:
The force due to kinetic friction is calculated by the equation
where is the normal force on the box from the ground. The frictional force is in the opposite direction of the force applied by you and your friend. Therefore, the net force can be calculated:
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