Answer:
a) The velocity is maximum at B.
b) The velocity is 0 at C and A.
c) The acceleration will be 0 at B
d) The acceleration is maximum at C and A.
Explanation:
In the attached image, we can see two sketches the first one is based on the principle os energy conservation and we can appreciate easily when the velocity is the greatest and when it will be 0.
In points A and C we have the maximum potential energy because the pendulum is at the highest elevation with respect to the reference point. And when the pendulum is in point B all the potential energy had been transformed into kinetic energy and therefore we will have the maximum velocity at this point.
For the acceleration analysis, we see the second sketch, this one is showing a free body diagram of the pendulum when it is forming a theta angle with respect to the vertical plane. And applying Newton's second law and contemplating the forces that are acting over the pendulum we have the equation showed in the image.
This equation shows that the acceleration which has the same direction as the velocity depends on the sin(theta) and we know that the equation will be zero (0) when the angle theta is 0. It means the acceleration will be 0 at point B. And maximum at points C and A.
Answer:
Explanation:
The mass of an electron is small compared to the neutron and proton, so it's negligible. It's like adding zero to a number.
<h2>
Option A is the correct answer.</h2>
Explanation:
For a simple pendulum we have at any position
Total energy = Constant
Kinetic energy + Potential energy = Constant
At maximum displacement of pendulum, velocity is zero, hence kinetic energy is zero.
At maximum displacement the pendulum only have potential energy.
Given that maximum potential energy is 10 J.
That is at any position
Kinetic energy + Potential energy = 10 J
Now we need to find kinetic energy when potential energy is 5 J.
Kinetic energy + 5 J = 10 J
Kinetic energy = 5 J
Option A is the correct answer.
Volt is the unit that measures the pressure or force that pushes the flow of electrons forward through a conductor.
When there is a circuit having a cell / battery , that cell/battery forms an electric field due to difference in voltages , and set a voltage of value equals to the difference in the voltage of two end of that cell/ battery . Because of which a electric field got set up in the conductor , which pushes electron to move inside the conductor . Unit of voltage is volt .
VOLT - A unit of electrical pressure (or electromotive force) which causes current to flow in a circuit. One volt is the amount of pressure required to cause one ampere of current to flow against one ohm of resistance. VOLTAGE - That force which is generated to cause current to flow in an electrical circuit.
Voltage is the pressure from an electrical circuit's power source that pushes charged electrons (current) through a conducting loop, enabling them to do work such as illuminating a light. In brief, voltage = pressure, and it is measured in volts (V).
To learn more about voltage here
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