Marek is trying to push a box of sports equipment across the floor. The arrow on the box is a vector showing the force Marek exerts.
Describe all the forces acting on the box.
Explain what needs to happen for the box to start moving.
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The role of static friction is to keep the box at rest. If we exert a horizontal force of 10 N on the box, the force of static friction acting on the box must be 10 N in the opposite direction, to keep the box from moving. The free-body diagram of this situation is shown in Figure 5.3c.
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