"Motion and Design" Motion and Force PPT

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"Motion and Design" Motion and Force PPT

Part One Content: Advantages and Disadvantages of Friction

When is friction bad for us? At what point does it benefit us?

When we walk or drive in a car, the friction is too small and the vehicle will slip. At this time, the friction is beneficial.

Friction hinders the progress of the scooter. The friction here is harmful.

The ability of a person to stand firmly on a scooter depends on the friction between the shoes and the scooter, and the friction here is favorable.

When the machine is running, the parts rub against each other and wear, and the friction here is harmful.

Sports and Design PPT, Part 2: What is the purpose of this design?

Let’s talk about the purpose of this design.

The soles of the shoes are made into patterns, and the car tires are made into patterns and hung with iron chains to increase the friction with the ground and have an anti-slip effect.

Bicycle handlebars and tires are made of rubber and have patterns on the surface. This can increase friction and have an anti-slip effect.

Magnesium powder can absorb sweat from the palms and increase the friction between the palms and the equipment. Allow athletes to hold the equipment firmly.

Maglev trains use magnetic force to levitate on the rails, reducing friction with the rails and traveling faster.

The bottom of the skates is made of metal into the shape of a skate blade to reduce friction with the ice surface and make skating smoother.

Sports and Design PPT, Part 3: Looking for good designs on bicycles

In order to make bicycle riding light and safe, designers have made careful designs.

What parts of a bicycle are closely related to sports?

Where does cycling require friction? What method is used to increase friction?

Where does cycling not require friction?

What method is used to reduce friction?

The bicycle was originally invented by a worker guarding the woods in 1817. At that time, bicycles were all made of wood, had no pedals or chains, and relied on their feet to alternately pedal the ground to move forward. Later, after countless people's continuous improvements, it became what it is now. Bicycles are now spread all over the world, bringing great convenience to people.

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Update Time: 2024-11-22

This template belongs to science courseware Fifth Grade Science Volume 1, Textbook Edition industry PPT template

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