Answer: 215.15 N
Step-by-step explanation:
If we draw a free body diagram of the mass we will have the following:
(1)
(2)
Where
is the tension force of the rope,
the mass,
the acceleration due gravity and
is the weight.
On the other hand, we can calculate
as follows:
Where
and

(3)
Now, we firstly need to find
from (2):
(4)

(5)
Substituting (5) in (1):
(6)
Finally: