Answer:
y = 0.1 m
Explanation:
The electrical power for point loads is
V =
k Sum qi / ri
in this case
V = k (
)
indicate that V = 0
r₂ = 
the distance r1 is
r₁ = y -0
the distance r2
r₂ = 0.14 -y
we substitute
0.14 - y =
y
y (
) = 0.14
y 1.4 = 0.14
y = 0.14 / 1.4
y = 0.1 m
Sound waves (m)
water waves (m)
radio waves (e)
ultraviolet (e)
waves in a wheat field (m)
Answer:
Part a)

Part b)

Part c)
F = 2.7 N
Explanation:
Part a)
As we know that the rotational kinetic energy of the merry go round is given as


here we know that


Now we have


Part b)
Now we know that work done due to torque = change in kinetic energy




Part c)
In order to stop it in four revolutions we have



F = 2.7 N