Basic Q's Net Force and Acceleration

  • Thread starter kstbts
  • Start date
  • #1
9
0

Homework Statement


akvdoo.jpg




Homework Equations


I am wondering if the answers given in the teacher's guide are incorrect.
Ans given for #2: [All same], [A,C,B,D]
Ans given for #3: [A,C,D,B]

The Attempt at a Solution


My answers:
#2a: Net forces: A,B,C are 5N; D is 10N. Therefore the order of the net forces from greatest to least is D, followed by A,B,C which are equal.
#2b: Their accelerations are a) 5N/5kg=1m/s2 b) 5N/10kg=0.5m/s2 c) 5N/5kg=1m/s2 d) 10N/20kg=0.5m/s2. Therefore the order of their accelerations from greatest to least would be A&C, which are the same, followed by B&D which are the same. Admittedly, the teacher's guide could be saying the same thing for this second part of the answer, but I can't be certain since their answer says nothing about A=C and B=D.
#3: Accelerations are:
a) a=(1000N-800N)/(1000N/9.8)=1.96m/s2
b) a=1.23 m/s2
c) a=1.4 m/s2
d) a= 0.98 m/s2
Therefore the order from greatest to least is A,C,B,D
 
Last edited:

Answers and Replies

  • #2
NascentOxygen
Staff Emeritus
Science Advisor
9,244
1,073
Hi kstbts. http://img96.imageshack.us/img96/5725/red5e5etimes5e5e45e5e25.gif [Broken]

I like your answers, they are the same as mine.
 
Last edited by a moderator:
  • #3
9
0
Thanks NascentOxygen.
 

Related Threads on Basic Q's Net Force and Acceleration

  • Last Post
Replies
7
Views
666
  • Last Post
Replies
2
Views
3K
S
Replies
3
Views
8K
  • Last Post
Replies
3
Views
841
  • Last Post
Replies
1
Views
6K
  • Last Post
Replies
1
Views
1K
Replies
5
Views
695
Replies
6
Views
497
Replies
8
Views
38K
  • Last Post
Replies
1
Views
2K
Top