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Quick question, what is necessary for an object to move?
I want to say mass & velocity but is there anything else?
I want to say mass & velocity but is there anything else?
Welcome to the PF.Quick question, what is necessary for an object to move?
I want to say mass & velocity but is there anything else?
As Halls alludes to, there is a concept in physics known as "relative" motion. So the object can move relative to you if it is stationary and you walk past it. I'm guessing that in your intro physics class they just want you to refer to the equation F=ma for this, but I could be wrong. How would you use that equation to try to answer this question?Quick question, what is necessary for an object to move?
I want to say mass & velocity but is there anything else?
There is an equation relating the retarding force of friction to the weight of the object and the coefficient of friction. Can you find the explanation of that equation in your textbook?I also have another question... If you push a box over a rough surface (high friction) at a constant speed, how much net force is there? How do you know?
Um idk I thought that if it had 0 mass then nothing would be moving but you can have 0 acceleration and still have it moving because of a constant velocity.As Halls alludes to, there is a concept in physics known as "relative" motion. So the object can move relative to you if it is stationary and you walk past it. I'm guessing that in your intro physics class they just want you to refer to the equation F=ma for this, but I could be wrong. How would you use that equation to try to answer this question?
Is it Ff = uFn?There is an equation relating the retarding force of friction to the weight of the object and the coefficient of friction. Can you find the explanation of that equation in your textbook?
Don't worry about the 0 mass case. The equation F=ma just says that the mass gives you the ratio between force and acceleration. And yes, if an object is already moving at a constant speed, no force is required to continue that motion (assuming no retarding forces exist like friction or air resistance, etc.)Um idk I thought that if it had 0 mass then nothing would be moving but you can have 0 acceleration and still have it moving because of a constant velocity.
Yep!Is it Ff = uFn?
Ff = friction
u = coefficient of friction
Fn = normal force
Don't worry about massless objects and frames of reference just yet. They are important, but at this point is might just lead to more confusion.Um idk I thought that if it had 0 mass then nothing would be moving but you can have 0 acceleration and still have it moving because of a constant velocity.