Answer:
α = 0
, w = w₀
Explanation:
Torque is related to angular acceleration by Newton's second law for rotational motion.
τ = I α
Where τ is the torque, I the moment of inertia and α the angular acceleration.
If we apply an external torque for the sum of all torques to be zero, the angular acceleration must fall to zero
α = 0
Since the acceleration is zero, the angular velocity you have at that time is constantly killed.
w = w₀ + α t
w = w₀ + 0
Gravity pulls the water down off the mountain, witch is run-off.
Answer:
three balls have the same speed
Explanation:
In a parabolic motion we have that

but the time just before the balls hit the ground is

Hence we have
ball A

ball B

ball C

Hence, all three balls have the same speed just before hit the groug
vA=vB=vC
I hope this is useful for you
regards