When a block is simultaneously pushed southward with a force of 18 N and northward with a force of 11 N, the combination of these forces on the block is.
A) 29 N north
B) 29 N South
C) 7 N South
D) 7 N North
When a block is simultaneously pushed southward with a force of 18 N and northward with a force of 11 N,?
2017-02-15 1:56 pm
回答 (3)
2017-02-15 1:59 pm
✔ 最佳答案
Take all forces pointing northward to be positive, and southward to be negative.Total force
= (+18 N) + (- 11 N)
= (+ 7 N)
= 7 N pointing southward
The answer: C) 7 N South
2017-02-15 5:46 pm
southward force = 18 N, and northward force = 11 N,
So,
Net-force = 18 - 11 = 7 N southward. <---------------/
Hence,
Answer is: (+ 7 N)
So,
Net-force = 18 - 11 = 7 N southward. <---------------/
Hence,
Answer is: (+ 7 N)
2017-02-15 5:18 pm
18S -11N = (18-11)S = 7S ...since southforce > northforce
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