"Design and Make a Small Racing Car" Sports and Force PPT Courseware 3

Description

"Design and Make a Small Racing Car" Sports and Force PPT Courseware 3

Design our little race car

Task

1. The body length cannot exceed 25cm;

2. Use rubber bands or balloons as power;

3. The driving distance should be as long as possible.

Thinking: Is it better to install the front and rear wheels of this car in the middle, or to keep the distance apart and install the wheels at both ends? Why?

The body of the chopstick trolley is as long as possible within the specified dimensions, which increases the length of the rubber band, thus increasing the power. The trolley only has a frame, which also reduces unnecessary weight.

Think: What’s so special about this car? What are the benefits of such a design?

The pole-type trolley is cleverly conceived. It uses a bamboo strip with elasticity to stand on the trolley and hang a power rubber band on it, avoiding the limitation of the body on the length of the rubber band.

How to increase the power of the car and extend the time the power acts on the car?

The body is lengthened as much as possible within the prescribed dimensions, which increases the length of the rubber band and thereby increases power.

If rubber bands are used to drive the wheels to move the car forward, how to overcome the problem of wheel slippage?

The wheels are a little rougher and the car is a little heavier.

If a balloon is used as power, how to reduce the weight of the car?

Choose lighter materials for the frame, such as foam.

Where on the car is friction harmful? How to reduce it?

The friction in the rotating shaft is harmful. Do not clamp these places during installation, and you can also add lubricating oil.

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Update Time: 2024-12-01

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

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