Question

5.) A string of length 1 m is fixed at one end and carries a
bob of 100. If string is revolved by 4 rad /s in horizontal
plane as shown in fig. then tension in the string is
a 1.6 N
b) 0.8 N
c) 3.2N

d) 2.4 N​

Answer 1

Answer:

1.6N

Explanation:

given:

m=100g=0.1kg

angular velocity (w)=4 rad/s

r= 1m

when it revolves,

tension = centrifugal force

T = mv^2/r=mw^2r

=0.1.(4)^2.1 = 1.6N