Help please I’ll mark as brainliest
1 answer:
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Answer:
a)
b)N= 21.29 rpm
Explanation:
Given that
Mass of the ball =m
Length of string = L
Lets take angular speed = ω
The centripetal force on the ball
F = m ω² L
To complete the circle ,at the top condition the force due to gravity should be equal to the centripetal force
Gravity force = mg
F= mg
m ω² L = m g
ω² L = g
When L= 2 m
Lets take g =10 m/s²
ω = 2.23 rad/s
To convert in rpm
N=Speed in rpm
N= 21.29 rpm