### Present Remotely

Send the link below via email or IM

• Invited audience members will follow you as you navigate and present
• People invited to a presentation do not need a Prezi account
• This link expires 10 minutes after you close the presentation

Do you really want to delete this prezi?

Neither you, nor the coeditors you shared it with will be able to recover it again.

For a Science Project
by

## Snigdha M

on 22 November 2013

Report abuse

Relations
1. Relationship between tread design and friction

2. Relationship between tread design and desired use

3. Relationship between Laws of Motion and "Science of Tread"
Newton's Laws of Motion
Differences in the tread patterns among different running shoes/ tennis shoes
The tread of tennis shoes differ depending on the surface of the tennis court. Tennis can be played on grass, clay, and concrete. Grass requires less tread for more movement, while clay may require more tread detail.
A running shoe's tread can also differ depending on the type of surface. Off-road runners prefer a less powerful tread, while cement or road-runners want a more prominent tread.
Some running shoes are made for minimalist or barefoot running. They have little padding and have thin soles. These shoes barely have tread.

Newton’s First Law
“An object at rest and an object in motion maintains its velocity unless it experiences an unbalanced force"
Newton’s Second Law
“The unbalanced force acting on an object equals the object’s mass time its acceleration”
F=m*a
Newton’s Third Law
“For every action, there is an equal and opposite reaction”
Means that in every interaction, there is a pair of forces acting on the 2 interacting objects.

Definitions

Shoe Tread- The part of a shoe or boot sole that touches the ground; the pattern on the sole of the shoe

Friction- The force that opposes the motion between two surfaces that are touching

Traction- the force that causes a moving thing to stick against the surface it is moving along

Inertia- tendency of an object at rest to remain at rest, or if moving, to continue moving at a constant velocity
By Snigdha and Diksha
1.
The texture and pattern of the tread allows flow through the cavities and the surface of the floor
Friction between the floor and the shoe tread is less when the the design is flat, and non-grooved compared to a grooved tread
Tread-grooved shoes have different depths and the depths change as the shoe is worn away to due to abrasion, wear, and friction
Shoes with grooved treads are helpful in causing friction between the shoe and the floor

2.
The design of the tread can be grooved or ungrooved which depends on your desired use
Ungrooved treads produce less friction, they slip on surfaces but are easy to maneuver around in
Grooved treads cause more friction with the surface, they are more sturdy but are not the best shoes for activities
Proper running shoes should have a tread that lets you move around

3.
Newton’s First Law of motion
You experience inertia when you stop running
Your body (the object in motion) will maintain its velocity unless it experiences an unbalanced force.
The tread of a shoe helps make the unbalanced force stronger.

Purpose of different elements within a tread design

Traditional herringbone patterns, smooth or non-marking, and clay-court soles are examples of shoe soles
The different style of sole is dependent on the desired use and therefore different elements are used to do this
Mesh, synthetic, and combination of both make up the upper part of a tennis shoe
Mesh is used because it stays the coolest and most breathable
Synthetic provides support and is sturdy for the upper layer, a combo of both provides the perfect combination of breathability and support
Heel counter is plastic to provide support and firmness when moving around, heel counter is part of the collar and should fit comfortably
Cushioning is through mid sole materials and ensure protection from impact
EVA is most commonly used material since its lightweight, flexible, and is shock absorbent

Does the material and composition of shoe soles affect traction and/or friction?
Yes. The surface of the soles of shoes have a significant effect on traction and friction. The soles of shoes have to provide enough traction to prevent falling and slipping, but too much traction can increase the risk of injuries.

What differences in friction/traction result from different surfaces for tennis shoes

Tennis shoes for hard courts are designed with higher durability, having a more resilient out-sole and supportive upper wear
They wear out faster due to playing on harder courts
Are made with stronger materials such as vinyl
Tennis shoes for softer courts designed with non-damaging traction
Clay court shoes still have ridges but they are closer together to prevent clogging which causes harmful friction with the surface
They are designed to cause no harm to the shoe or the court due to harmful friction/traction

Citations
http://www.itftennis.com/media/118645/118645.JPG