Forces
暂无描述。系统推荐的高质量记忆内容，适合每天坚持背诵学习。
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What are vectors?
Invisible arrows that show the direction of forces on an object
What is acceleration?
The forces causing an object to speed up
What is deceleration?
The forces causing an object to slow down or stop moving
What is friction?
A force that happens whenever an object slides or rolls over something
What is traction?
The action of drawing or pulling something across a surface
What are Newtons?
Units that measure the amount of force needed to accelerate an object
What is gravity?
A non-contact force that attracts objects to each other
What is weight?
The measure of heaviness of an object
What is mass?
The amount of matter in an object
What is air resistance?
A force that acts in the opposite direction to an object moving through the air
What is lift?
An upward force that allows an object to stay in the air
What is thrust?
The push force that gets an object to move fowards
What is drag?
drag is the friction caused by the air sliding around the object when moving forwards
What is buoyancy?
a force in the water that causes objects to rise or float upwards
What is surface tension?
the cohesion of water particles on the surface of the water
What are domains?
Mini magent particles