Why Was Mass Given for Work Calculation?

  • Thread starter Thread starter teggenspiller
  • Start date Start date
  • Tags Tags
    Mass
AI Thread Summary
The discussion centers on calculating the work done by a 200 N force moving a 55 kg television across a 10 m surface, resulting in a work value of 6000 J. Participants question the relevance of the mass provided in the problem, suggesting it may serve to test understanding of physics principles and problem-solving skills. The mass could also be necessary for potential follow-up questions related to kinetic energy or other calculations. The inclusion of mass adds specificity to the problem and reinforces the importance of discerning relevant information. Overall, the discussion emphasizes the educational purpose behind including seemingly extraneous details in physics problems.
teggenspiller
Messages
94
Reaction score
0

Homework Statement


A horizontal force of 200 N is applied to move a 55 kg television set across a 10 m level surface. What is the work done by the 200 N force on the television set?



ke= 1/2 m*v^2

w=f*d





Homework Equations


I can find work: :6000J




The Attempt at a Solution



So why was the value of mass given?
 
Physics news on Phys.org
teggenspiller said:
So why was the value of mass given?
To see if you know what you're doing, perhaps. Part of being able to solve a problem is knowing what matters and what doesn't. Giving more details also makes the description more specific. And you may need the mass for follow up questions.
 
Wow. Thanks alot. Knew they were trying to f with me.
 
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...
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 .
Back
Top