Answer:
(a) 103.49 N
(b) 970.2 N
Solution:
As per the question:
Mass, m = 66 kg
Force = 10 weight = 10 mg N
where
g = acceleration due to gravity
Now,
(a) To calculate the maximum frictional force:
[tex]f = \mu N[/tex]
where
f = frictional force
[tex]\mu = 0.16[/tex] = coefficient of friction
N = mg = normal reaction
[tex]f = \mu mg = 0.16\times 66\times 9.8 = 103.49\ N[/tex]
(b) In this case, to calculate the frictional force:
[tex]f' = \mu_{k} F = \mu_{k} 10mg[/tex]
where
[tex]\mu_{k} = 0.15[/tex]
Now,
[tex]f' = 0.15\times 10\times 66\times 9.8 = 970.2\ N[/tex]
