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Answer for first question
A.
a. N-m*g=m*a
and we get N = m (g+a) = 791 N
b. N-m*g =-m*a
N = m(g-a)=581 N
c.as velocity is constant , a= 0
that is N = m*g = 686 N
B.
4T
The force R on the man will be in upward direction .
When a = 1.5 upwards
When a = 1.5 downwards
When velcoity is constant , a = 0
Similarly , The cables support the system consisting of man and elevator.
So, R = 4T
and M = 70 +1500 = 1570
When a = 1.5 upwards
When a = 1.5 downwards
When velcoity is constant , a = 0
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