What are the choices? then i will answer
The force that is pushing the crate up the ramp is competing with at least another two forces, those being G force= defines the attraction to the earth and Ff, the friction between the crate and the rough material of the ramp
Any Force can be defined by the weigh of a particular body and the acceleration
the kinetic friction indicative would be defined by the report between the active force and the friction force, considering G
So 5000-22%×5000=250× a
a=3900/250 m/s
Answer: Because of the its assumption of earth being at the centre of the universe and also, its parallax argument.
Explanation: Geocentric model is the
theory of the structure of the solar system (or the universe) in which Earth is assumed to be at the centre of it all. It was generally accepted until the 16th century, after which it was superseded by heliocentric models
Among many, geocentric model was considered because of its stellar parallax argument.
What is parallax? Parallax is the apparent change in position of objects due to a change in observation location
The ancient Greeks claimed that if the Earth is moving around the Sun then the stars should shift their positions due to this orbital motion (called stellar parallax). The stars don't shift. They don't shift enough for you to notice, but they do indeed shift. This is essentially the same reason the moon appears to follow you around when you drive - it's too far away for any apparent shift due to your motion.
When you lay down your weight is distributed over a much larger surface area than while standing. You are putting a much greater force on a much smaller area standing.
It depends on the objects chemical composition.
