What two sources of friction do you have to overcome when you are walking?
I did not see your question earlier.
Air friction and internal friction in the joints of the body, especially the knees and ankles, must be overcome when walking. Neither are very large at normal walking speeds.
The friction of your feet on the ground does not have to be overcome unless there is slipping; that it is what pushes the body forward.
When you are walking, two sources of friction that you have to overcome are static friction and kinetic friction.
1. Static friction: This is the frictional force between two surfaces that are in contact with each other but not in relative motion. When you stand still or start to walk, static friction is the force that keeps you from sliding or slipping. To overcome static friction and start moving, you need to generate enough force to exceed the opposing force of static friction.
2. Kinetic friction: Once you start walking and are in motion, the friction that acts between your feet and the ground is known as kinetic friction. Kinetic friction opposes the relative motion between the two surfaces in contact. While walking, you need to continuously overcome kinetic friction to maintain your motion.
To overcome these sources of friction and walk, you can take the following steps:
1. Pushing against the ground: To overcome static friction and begin walking, you can push against the ground with your foot. The force you apply to the ground provides an opposite reaction that propels you forward.
2. Maintaining momentum: Once you are in motion, you need to keep applying force against the ground to overcome kinetic friction and continue walking. This involves using your leg muscles to push off from the ground with each step, propelling your body forward.
3. Adjusting body weight distribution: Proper weight distribution is important for efficient walking. Distribute your weight evenly on each foot with each step, allowing for a push-off with the back foot while keeping balance.
4. Wearing appropriate footwear: The type of shoes you wear can also affect your ability to overcome friction while walking. Shoes with good traction and grip can help you maintain stability and reduce slipping, increasing the efficiency of your walking motion.
By understanding and actively working against static and kinetic friction, you can effectively overcome these forces and walk with ease.