8. A receptacle, plug, or any other electrical device whose design limits the ability of an electrician to come in contact with
1 answer:
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Answer:
19.74 N
Explanation:
mass of ball (m) = 0.25 kg
radius (r) = 0.5 m
time (t) = 2 revolutions per seconds = 1/2 = 0.5 second per revolution
find the tension in the string
tension (T) =
- where velocity (v) =
tension now becomes (T) =
tension (T) =
- now substituting the values of mass (m), time (t) and radius (r) into the equation above we have
tension (T) =
tension (T) = =
= 19.74 N