Man versus Iron Weight

  • Thread starter Emanresu
  • Start date
  • #1
53
0
http://www2.uah.es/jmc/ai14.pdf

On page 2 of the above pdf there is an example in a box with title 'Acceleration'
which states that there is a difference between a man pulling on a rope with 600N force and an iron weight of 60Kg (g = 10) tied to the rope. The difference being that once the system starts moving the iron weight generates less acceleration. I don't understand the explanation given. Could someone please explain in a different way.

Thanks,

E.
 

Answers and Replies

  • #2
Doc Al
Mentor
45,254
1,614
What pulls the cart is the tension in the rope. Which case produces the greater tension? Hint: If the cart is accelerating, can the tension equal the weight of the hanging mass?
 
  • #3
kdv
348
6
http://www2.uah.es/jmc/ai14.pdf

On page 2 of the above pdf there is an example in a box with title 'Acceleration'
which states that there is a difference between a man pulling on a rope with 600N force and an iron weight of 60Kg (g = 10) tied to the rope. The difference being that once the system starts moving the iron weight generates less acceleration. I don't understand the explanation given. Could someone please explain in a different way.

Thanks,

E.

The man keeps applying a force of 600 N.

Now consider the weight as it is falling. What is the tension in the rope? Since the weight is accelerating downward, the tension in the rope has to be less than the iron weight therefore the tension is less than 600 N.
 
  • #4
53
0
Duh ! It seems so obvious now !

Thanks,

E.
 

Related Threads on Man versus Iron Weight

Replies
4
Views
5K
Replies
13
Views
3K
  • Last Post
Replies
8
Views
23K
  • Last Post
Replies
8
Views
2K
  • Last Post
Replies
4
Views
73K
  • Last Post
Replies
11
Views
1K
Replies
3
Views
924
  • Last Post
Replies
5
Views
10K
  • Last Post
Replies
3
Views
5K
Top