Answer:
The moment of inertia of a skater is :
Explanation:
we can use parallel theorem to find the moment of inertia of a skater.
- Arm extended cylinder mass:
- Radius:
- Length:
- and
Answer:
mass or size, distance
Explanation:
using newton's law of of gravity the only values that aren't constants are distance and mass since an objects mass applies to its gravity along with the distance
For this case we have that by definition, physical power refers to the amount of work done for a unit of time.
So:
Where:
W: It's the work
t: It's time
The power units are in
So, according to the problem data we have:
Clearing the work of the formula:
Thus, the work is 1200 joules.
Answer:
Option C
Answer:
F = F₀ 0.2
Explanation:
For this exercise we apply Coulomb's law with the initial data
F₀ = k q_A q_B / d²
indicate several changes
q_A ’= ½ q_A
q_B ’= 1/10 q_B
d ’= ½ d
let's substitute these new values in the Coulomb equation
F = k q_A ’q_B’ / d’²
F = k ½ q_A 1/10 q_B / (1/2 d)²
F = (k q_A q_B / d2) ½ 1/10 2²
F = F₀ 0.2