Calculating Net Work: A Box Being Pushed Across a Floor

AI Thread Summary
The net work done on the box is calculated by first determining the net force acting on it, which is 52 N to the right after accounting for the friction force. Using the formula for work, W(net) = Fd cos(theta), with a displacement of 8 meters and an angle of 0 degrees, the calculation yields 416 joules. The solution appears correct based on the provided values and equations. This confirms that the net work done on the box is indeed 416 joules.
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Homework Statement


a box is pushed horizontally across a floor with a force of 70 N to the right. There is a friction force also acting on the box in the opposite direction of 18 N. if the box is displaced 8 meters. what is the net work done on the box?

Homework Equations


W(net)= Fd cos (theta)

The Attempt at a Solution


the net forces on the box in the horizontal direction is= 70N - 18N= 52N to the right
Since its moving horizontally, which is 0 degrees. and I am given displacement as 8 meters, and the force calculated above:

w(net)= (52N)(8m) cos (0)
= 416 joules

Does this look right?
 
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Yeah its look like right
 

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