Answer:
The speed of the ball is 0.8 m/s.
(D) is correct option.
Explanation:
Given that,
mass of ball = 3.0 kg
length = 50 cm
We need to calculate the speed of the ball
Using relation between the centripetal force and tension
[tex]\dfrac{mv^2}{r}=T[/tex]
[tex]v^2=\dfrac{T\times r}{m}[/tex]
Where, m = mass
T = tension
r = radius
Put the value into the formula
[tex]v=\sqrt{\dfrac{3.8\times50\times10^{-2}}{3.0}}[/tex]
[tex]v=0.8\ m/s[/tex]
Hence, The speed of the ball is 0.8 m/s.
