A small object of mass 0.2 kg is whirled round in horizontal circle in gravity free space. It is tied to a string of length 0.5 m and rotates with constant angular speed of 4 rad/s. The tension in the string is ?
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Answer:
1.6 N
Step-by-step explanation:
In horizontal circular motion tension in the string is balanced by the outward centrifugal force
The centrifugal force = mrω^2
m= mass
r= length of string ( radius of circle) = 0.5m
angular velocity = ω=4 rad/sec
T= mrω^2
T= 0.2×0.5×4^2= 1.6 N
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