Answer:
4 and 8
Step-by-step explanation:
Answer:
9
Step-by-step explanation:
We know that

The balls hits the ground when h(t)=0, so

Note I only considered the positive case because time must be positive.
Answer:
6? i am soooo confused
Step-by-step explanation:
The moment of inertia of a spherical shell is I = mr²
If two spheres have the same moment of inertia, then
I₁ = I₂
m₁(r₁)² = m₂(r₂)²
Solve for the second mass:
m₂ = m₁ (r₁/r₂)²
Given m₁ = 1 kg, r₁ = 2 m, r₂ = 1m,
m₂ = (1 kg) (2 m / 1 m)² = 4 kg