Newton's Three Laws: 1st and 3rd

  • Thread starter Thread starter whitehorsey
  • Start date Start date
  • Tags Tags
    Laws
AI Thread Summary
The discussion focuses on identifying correct wordings of Newton's First and Third Laws. The accurate phrasing for the First Law is that an object in motion remains in motion unless acted upon by a force. The Third Law is correctly stated as when two objects interact, they experience equal and opposite forces. Other proposed statements, such as "objects always fall" and "what goes up, must come down," are not accurate representations of Newton's laws. The consensus confirms the correct formulations of the laws as stated.
whitehorsey
Messages
188
Reaction score
0
1. Which of these are possible wording of Newton's Three Laws? Pick which ones are correct.

Objects always fall.
An object in motion always stays in motion unless acted upon by a force.
When two objects interact, they experience equal and opposite forces.
What goes up, must come down.
An object in motion only stays in motion if acted on by a force.


3. I think it would be just these:
An object in motion always stays in motion unless acted upon by a force. (1st)
When two objects interact, they experience equal and opposite forces. (3rd)
 
Physics news on Phys.org
looks right to me
 
Thanks!
 
Kindly see the attached pdf. My attempt to solve it, is in it. I'm wondering if my solution is right. My idea is this: At any point of time, the ball may be assumed to be at an incline which is at an angle of θ(kindly see both the pics in the pdf file). The value of θ will continuously change and so will the value of friction. I'm not able to figure out, why my solution is wrong, if it is wrong .
TL;DR Summary: I came across this question from a Sri Lankan A-level textbook. Question - An ice cube with a length of 10 cm is immersed in water at 0 °C. An observer observes the ice cube from the water, and it seems to be 7.75 cm long. If the refractive index of water is 4/3, find the height of the ice cube immersed in the water. I could not understand how the apparent height of the ice cube in the water depends on the height of the ice cube immersed in the water. Does anyone have an...
Back
Top