## Related questions with answers

Make a free-body diagram of someone pushing a refrigerator that shows: a. A net force of 100 N with the refrigerator being pushed to the right. b. The refrigerator in equilibrium.

Solution

Verified**When** we want to find **a net force** that acts on a body, we have to find the vector sum of every force that is applied to said body.

**In order** for the net force to be equal to **zero**, the vector sum of all of the forces has to be **zero** as well.

**The equilibrium** situation is the situation in which the net force has to be **zero**.

**Assume** that the net force along the vertical $F_{\mathrm{net,y}}$ is **zero** because the **weight** of the refrigerator $F_{\mathrm{g}}$ is balanced with the **normal force** $N$ of the ground.

$F_{\mathrm{net,y}}=F_{\mathrm{g}}-N=0$

**Then**, we have to pay attention to the forces along the horizontal.

**If we want** the refrigerator to move in the direction to the right, the net force along the horizontal has to be **nonzero** and pointing to the **right**.

**The equilibrium** position, like we said above, means the net force acting on the refrigerator has to be **zero**, in all **directions**.

**Check out** the graphs for these two situations.

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