MindMap Gallery Gravity, elasticity, friction
Shanghai Science Edition Junior High School Physics Summary of Gravity, Elasticity, and Friction ~ Detailed introduction, comprehensive knowledge, I hope it can be helpful to everyone!
Edited at 2024-01-30 00:18:51This Valentine's Day brand marketing handbook provides businesses with five practical models, covering everything from creating offline experiences to driving online engagement. Whether you're a shopping mall, restaurant, or online brand, you'll find a suitable strategy: each model includes clear objectives and industry-specific guidelines, helping brands transform traffic into real sales and lasting emotional connections during this romantic season.
This Valentine's Day map illustrates love through 30 romantic possibilities, from the vintage charm of "handwritten love letters" to the urban landscape of "rooftop sunsets," from the tactile experience of a "pottery workshop" to the leisurely moments of "wine tasting at a vineyard"—offering a unique sense of occasion for every couple. Whether it's cozy, experiential, or luxurious, love always finds the most fitting expression. May you all find the perfect atmosphere for your love story.
The ice hockey schedule for the Milano Cortina 2026 Winter Olympics, featuring preliminary rounds, quarterfinals, and medal matches for both men's and women's tournaments from February 5–22. All game times are listed in Eastern Standard Time (EST).
This Valentine's Day brand marketing handbook provides businesses with five practical models, covering everything from creating offline experiences to driving online engagement. Whether you're a shopping mall, restaurant, or online brand, you'll find a suitable strategy: each model includes clear objectives and industry-specific guidelines, helping brands transform traffic into real sales and lasting emotional connections during this romantic season.
This Valentine's Day map illustrates love through 30 romantic possibilities, from the vintage charm of "handwritten love letters" to the urban landscape of "rooftop sunsets," from the tactile experience of a "pottery workshop" to the leisurely moments of "wine tasting at a vineyard"—offering a unique sense of occasion for every couple. Whether it's cozy, experiential, or luxurious, love always finds the most fitting expression. May you all find the perfect atmosphere for your love story.
The ice hockey schedule for the Milano Cortina 2026 Winter Olympics, featuring preliminary rounds, quarterfinals, and medal matches for both men's and women's tournaments from February 5–22. All game times are listed in Eastern Standard Time (EST).
Gravity, elasticity, friction
force
Unit: N
Interaction
force effect
Change the state of motion of an object
deform an object
How to describe force
three elements of force
size
direction
point of action
Schematic diagram: t uses a line segment with an arrow to represent the magnitude, direction, and point of action of the force.
Elasticity
Definition: The force generated by the elastic deformation of an object is called elastic force
Generate conditions
Whether to contact
Whether elastic deformation occurs
example
pressure, support, thrust
spring dynamometer
Within the elastic limit, the greater the tension on the spring, the longer it stretches
F=kx
gravity
Definition: The force that objects near the ground receive due to the attraction of the earth is called gravity. G
The force exerting object is the earth
Three elements
size
G=mg
direction
straight down
point of action
center of gravity of object
Friction
Definition: When two objects in contact with each other move relative to each other or have a tendency to move relative to each other, a force will be generated on the contact surface that hinders relative movement. This force is called friction.
Generate conditions
Two objects are in contact with each other
Two objects squeeze each other to produce elastic force
There is relative motion or a tendency to move relative to each other between two objects
rough surface
Influencing factors
Material, pressure, roughness of contact surface...
Classification
sliding friction
rolling friction
static friction
Ways to increase or decrease friction
pressure
Contact surface roughness
Slide and scroll