8. Bring the crate against one wall and push it the other way enough that it keeps moving even after you let it go. While the crate is still moving is there still a net force? If so, what is it and what does it cause the crate to do?

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UpStudy AI · Accepted Answer

Yes, there is still a net force acting on the crate while it is moving after you let go. Here's a breakdown of what's happening:

### **Forces Acting on the Crate:**

1. **Applied Force:** When you push the crate against the wall, you're applying a force that propels it away from the wall.
2. **Contact Force from the Wall:** The wall exerts an equal and opposite force (Normal Force) back on the crate, perpendicular to the wall's surface.
3. **Frictional Force:** As the crate moves, friction between the crate and the wall (or the floor, depending on the scenario) acts opposite to the direction of motion.

### **Net Force and Its Effects:**

- **Net Force Exists:** Even though the crate is moving, the frictional force opposing its motion creates a net force acting opposite to the direction of movement.
  
- **Direction of Net Force:** The net force is directed opposite to the crate's velocity, meaning it acts to slow the crate down.
  
- **Resulting Motion:** This opposing net force causes the crate to **decelerate** (slow down) over time. Eventually, if no additional forces are applied, the crate will come to a stop due to this net opposing force.

### **Key Points:**

- **Inertia:** According to Newton's First Law of Motion, an object in motion will stay in motion with the same velocity unless acted upon by a net external force. In this case, the frictional force provides that external force.
  
- **Balanced vs. Unbalanced Forces:** If the net force were zero (balanced forces), the crate would continue to move at a constant velocity. However, the presence of friction makes the forces unbalanced, leading to a change in the crate's velocity.

### **Conclusion:**

While the crate is moving after you release it, friction (or another opposing force) acts on it, creating a net force that opposes its motion. This net force causes the crate to slow down and eventually come to rest.

**Summary:**  
Yes, while the crate moves, friction (an opposing force) creates a net force that acts against its motion, causing the crate to slow down.
While the crate is moving, friction creates a net force that opposes its motion, causing the crate to slow down.

8. Bring the crate against one wall and push it the other way enough that it keeps moving even after you let it go. While the crate is still moving is there still a net force? If so, what is it and what does it cause the crate to do?

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