After the right string is cut, the meterstick swings down to where it is vertical for an instant before it swings back up in the
1 answer:
The Angular Speed of the Meterstick after it becomes vertical is given as:
= 5.800 rad/s. This is computed using the formula for conservation of energy.
<h3>What is Angular Speed?</h3>
Angular Speed is defined as the measure of how quick or fast the central angle of a body that is rotational is changing in relation to time. Please see the attached for the full question.
<h3>What is the solution for the Angular Speed of the phenomena described?</h3>Recall that the formula for conservation of energy is given as:
(1/2)(<em>Iω²) = mg(L/4) where
L= Lenght and</em>
<em>m = Mass. Please refer to the attached questions.</em>
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Factoring the moment of inertia about the pivot, we solve for the angular speed using the following formula:<em>
ω = </em>
=
Hence, the angular speed is:
ω = 8.800rad/s
Learn more about Angular speed at:
brainly.com/question/540174
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A. 0.77 A
Using the relationship:
where P is the power, V is the voltage, and R the resistance, we can find the resistance of each bulb.
For the first light bulb, P = 60 W and V = 120 V, so the resistance is
For the second light bulb, P = 200 W and V = 120 V, so the resistance is
The two light bulbs are connected in series, so their equivalent resistance is
The two light bulbs are connected to a voltage of
V = 240 V
So we can find the current through the two bulbs by using Ohm's law:
B. 142.3 W
The power dissipated in the first bulb is given by:
where
I = 0.77 A is the current
is the resistance of the bulb
Substituting numbers, we get
C. 42.7 W
The power dissipated in the second bulb is given by:
where
I = 0.77 A is the current
is the resistance of the bulb
Substituting numbers, we get
D. The 60-W bulb burns out very quickly
The power dissipated by the resistance of each light bulb is equal to:
where
E is the amount of energy dissipated
t is the time interval
From part B and C we see that the 60 W bulb dissipates more power (142.3 W) than the 200-W bulb (42.7 W). This means that the first bulb dissipates energy faster than the second bulb, so it also burns out faster.