The coefficient of friction between two surfaces is 0.8
Asked by admin @ in Physics viewed by 362 People
The coefficient of friction between two surfaces is
u = 0.8. The tension in the string (a) ON(0) 4N(b) 6N(d) 8N
Answered by admin @
Given:
The frictional force coefficient μ=0.8
To find:
The tension in the string
Solution:
The normal is acting upward and weight acting downward
As F=μN=μmgcosФ
F=0.8×1×10×cos(30)
F=6.928 N
So now the frictional also acting downward direction
mgsinФ=1×10×sin30
=5 N
So the downward force
mgsinФ=F+T
6.928=5+T
T=0
We have taken zero as the approx value of the tension on the string.
Option A is correct
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