Solution Found!
When solving for speed in Example 7.4, we kept only the
Chapter 7, Problem 6(choose chapter or problem)
When solving for speed in Example \(7.4\), we kept only the positive root. Why?
Equation Transcription:
Text Transcription:
7.4
Questions & Answers
QUESTION:
When solving for speed in Example \(7.4\), we kept only the positive root. Why?
Equation Transcription:
Text Transcription:
7.4
ANSWER:
Solution 6CQ :
Step 1 of 4:-
Our goal is to find the reason of why the positive root of the solution has taken for the velocity of the block.
First, let’s discuss example 7.4 from where the problem came.
The applied force is, .
The frictional force which is opposing the motion is, .
As we know that, the frictional force can be written as,
-------------------(1)
Where is the kinetic friction coefficient and
is the normal reaction which is generally
.
Where the mass is given as, .
So, from equation (1),
.