The answer is: 201 J of kinetic energy.
<h2>Why?</h2>The motion of a pendulum (with no friction considered) is a continuous exchange between potential energy and kinetic energy.
So, at the highest point of its swing, the potential energy will be the maximum potential energy that the pendulum can have and the kinetic energy will be 0 since at max height the speed tends to 0.
On the opposite side, when the pendulum is at the bottom (the lowest point of its swing) the potential energy will be the minimum (tends to 0) but the kinetic energy will be the maximum.
Also, in the pendulum motion, the total energy is conserved, meaning that:
Where,
PE(h),is the potential energy at the highest point.
KE(h), is the kinetic energy at the highest point.
PE(l), is the potential energy at the lowest point (bottom of pendulum swing).
KE(l), is the kinetic energy at the lowest point (bottom of pendulum swing).
m, is the mass of the object.
g, is the acceleration of gravity.
v, is the speed of the object.
So, what is the energy at the bottom of its swing?
So, the pendulum has 201 of kinetic energy at the bottom of its swing.
Meaning that the energy is conserved.
Have a nice day!
Answer:
Explanation:
When an object goes on a circular movement, it has a centripetal acceleration that always points toward the center of the circle, it is the responsible of the change of direction in the movement of the object. and that centripetal acceleration is related with the speed in the next way:
, with v the speed, r the radius of the track that is half of the diameter (22.5 m)
Answer:
Explanation:
Total Internal Reflection (TIR) occurs when the angle of incident exceeds the value of critical angle and as a result of which the light gets internally reflected and does not refract the light enters at one point and exits at the other like that of an optical fiber.
Critical angle is defined as that incident angle for which the refracted angle is a right angle.
Now, in case a prism is brought close to the angle of TIR, the refracted beam angle increases up to the point where it reaches .
As it exceeds , the beam will be internally reflected without any refraction. So, in reaching the point of TIR, the intensity of the refracted beam decreases and is completely diminished to 0 at critical angle.
The beam intensity inside the prism increases and is maximum at the point of TIR, i.e., at critical angle.
Once TIR is initiated, i.e., the angle exceeds the critical angle, internal reflection occurs with no refracted rays.
The question is incomplete! circuit figure is attached below and answer and explanation is provided below.
Answer:
Bulb_A = Bulb_B = Bulb_D and Bulb_C = 0.
Explanation:
What happens when switch is open?
When the switch is open Bulb_C is open circuited meaning that there is no way for the current to flow through it. This path offers infinite resistance to the current therefore, current will try to take a least resistance path that is through Bulb_B.
So eventually, when the switch is open the circuit becomes a simple series circuit with path From battery to Bulb_A to Bulb_B to Bulb_D to battery with Bulb_C = 0.
What happens in a series circuit?
We know that in a series circuit, there is only one path for the current to flow therefore, same current will flow through all the series Bulbs and their brightness will be same. Bulb_A = Bulb_B = Bulb_D
Brightness in a series circuit:
We also know know that in a series circuit, resistance gets summed up and voltage across each Bulb gets shared which results in less power dissipation that's why Bulbs connected in series appear dimmer as compared to when they are connected in parallel.
Answer:
492.183 nm
Explanation:
x = Distance from the central maximum to the first minimum = 1.35 mm
l = Distance of screen = 2.13 m
d = Distance of gap = 0.705 mm
m = Order = 1
We have the relation
The wavelength of the light is 492.185 nm