Question
1. The frictional force depends on the speed of the crate. 2. The frictional force depends only on the surface across which the crate slides. 3. The frictional force arises from tiny bumps in both surfaces which opposes relative motion. 4. The frictional force comes from the electrostatic force. Help Xolile classify each of these statements as true or false.
Ask by Fuentes Bird. in South Africa
Feb 21,2025
Upstudy AI Solution
Tutor-Verified Answer
Answer
1. False
2. True
3. True
4. False
Solution
Let's analyze each statement regarding the frictional force:
1. **The frictional force depends on the speed of the crate.**
- **False**: The frictional force is generally considered to be independent of speed for static and kinetic friction under normal conditions. While there can be some exceptions at very high speeds (like in fluid dynamics), in most practical scenarios, friction does not depend on speed.
2. **The frictional force depends only on the surface across which the crate slides.**
- **True**: The frictional force is primarily determined by the nature of the surfaces in contact (e.g., roughness, material properties) and the normal force acting between them.
3. **The frictional force arises from tiny bumps in both surfaces which opposes relative motion.**
- **True**: Friction is caused by the interactions between the microscopic irregularities (bumps) on the surfaces in contact, which create resistance to motion.
4. **The frictional force comes from the electrostatic force.**
- **False**: While electrostatic forces can play a role in certain specific situations (like in the case of static friction at a microscopic level), friction is primarily a result of mechanical interactions between surfaces rather than electrostatic forces.
### Summary:
1. False
2. True
3. True
4. False
Answered by UpStudy AI and reviewed by a Professional Tutor
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Simplify this solution The Deep Dive
1. False - The frictional force generally does not depend on the speed of the crate; it is mostly constant at a given surface and load unless dynamic conditions change significantly. 2. True - The frictional force does depend on the nature of the surfaces in contact, such as roughness and material type, in addition to the load applied. 3. True - Friction does arise from the microscopic irregularities in the surfaces that make contact, which interact to resist motion. 4. False - While electrostatic forces can play a role in some contexts (like static friction), the primary cause of friction is the physical interaction between the surfaces rather than electrostatic forces.
