The answer would be c. hope this helps☺
Answer:
T = 13.3 N
Explanation:
In this exercise we use Newton's second law, in the lower birth of the circle the tension and force are opposite, so the tension has its maximum value
T - W = m a
The acceleration is centripetal
a = v² / r = w² r
We replace
T = mg + m w² r
The angular velocity is related to the period
w = 2π f = 2π / T₀
T₀ = 2.10 s
T = m (g + 4π² r / T₀²)
Let's calculate
T = 1.35 (9.8 + 4π² 1.10 /2.10²)
T = 13.3 N
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Description
In classical mechanics, impulse is the integral of a force, F, over the time interval, t, for which it acts. Since force is a vector quantity, impulse is also a vector quantity. Impulse applied to an object produces an equivalent vector change in its linear momentum, also in the resultant direction.
A) When a charge is moved in an electric field the work done (W) is calculated as charge*(change in potential). We can write W = q*V or V = W/q = 10/1 = 10V . This voltage is a difference in electric potential between 2 points within the field. If the charge is positive, and positive work is done upon it, then the final position is more positive than the original one.
<span>b) If a charge (Q) is released from rest and falls through a potential difference V, then its gain in energy (KE if no other force acts on the charged body) is q*V = 10J. This is the same as the work done in moving the charge to its new position in part (a), and is an example of the conservation of energy.</span>
Answer:
Explanation:
Well, lets say you park your car on the top of a hill, gravitational energy prevents it from the car falling back. Or a snow pack, aka before a potential avalanche. Though gravity cannot keep it safe forever, gravitational energy keeps it from crashing asap. In this case, it gives you time to escape. Altogether, gravitational force keeps the earth in it's atmosphere.
