Question

A stick figure is pushing three boxes across the screen. The mass of the blue box is 74kg, the mass of the red box is 86kg and the mass of the yellow box is 16kg. How hard does the stick figure have to push to get the boxes moving, if μs is 0.92?

Answer 1

1586.82 N

Explanation:

Add the masses of the boxes together since theyre all moving as essentially one object. Multiply that number by 9.8 to get the normal force, and then multiply that number by .92 to get the force of friction. The force of friction in this case is that minimal amount of force that the push must overcome.