Answer:
Her angular speed (in rev/s) when her arms and one leg open outward is 1.4 rev/s
Explanation:
given information:
moment inertia of arm and leg when in, I₁ = 0.9 kgm²
moment inertia of arm and leg when extended, I₂ = 2.9 kgm²
angular speed when in, ω₁ = 4.5 rev/s
so, her angular speed (in rev/s) when her arms and one leg open outward is
L₁ = L₂
I₁ω₁ = I₂ω₂
ω₂ = I₁ω₁/I₂
= 0.9 x 4.5/2,9
= 1.4 rev/s
Answer:
Weak intermolecular forces, low thermal energy. When an object such as liquid becomes a solid in form, this is sometimes caused by drop of heat, kinetic, energy in an object. And fast if there's weak molecular interaction.
Explanation:
<span>PE = mass * height * g = 87.60 J
Frictional force = m * g * sin theta * uk = 4.7 kg * 9.81 m/sec^2 * sin 36.87 * 0.3 = 8.299 N
Work done by friction = force * distance = 41.50 J
Remaining energy to be converted to KE = 87.60 J - 41.50 J = 41.10 J</span>hope it helps
Answer:
If velocity is higher, then traversed distance during any time increment dt is higher. This tells you that the amount of energy delivered to the object is proportional to the velocity, which is proportional to elapsed time t.
Explanation:
If velocity is higher, then traversed distance during any time increment dt is higher. This tells you that the amount of energy delivered to the object is proportional to the velocity, which is proportional to elapsed time t.
