Answer: R=24.2Ω
Explanation: <u>Power</u> is rate of work being done in an electric circuit. It relates to voltage, current and resistance through the following formulas:
P=V.i
P=R.i²
The resistance of the system is:
R = 24.2Ω
<u>For the device, resistance is 24.2Ω.</u>
Answer:
In physics and engineering, a resultant force is the single force and associated torque obtained by combining a system of forces and torques acting on a rigid body. The defining feature of a resultant force, or resultant force-torque, is that it has the same effect on the rigid body as the original system of forces.
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Answer:
Part a)
Part b)
Explanation:
Part a)
Change in potential energy of a charge is given as
here we know that
for proton
also we have
now we have
Part b)
Change in potential energy of a charge is given as
here we know that
for proton
also we have
now we have
Answer:
Acceleration is equal to the displacement of an object divided by the time the object takes to complete the path
Explanation:
In other words, you can say that acceleration is the increase in the rate or speed of something.
Note: acceleration can also be negative, which means that instead of increasing, decrease in the rate or speed will happen. Such an acceleration is called deceleration.
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Answer:
Part 1)
Part 2)
Part 3)
Part 4)
Part 5)
Explanation:
Part a)
Initial angular momentum of the merry go round is given as
here we know that
now we have
Part b)
Angular momentum of the person is given as
so we have
R = 1.99 m
so we have
Part 3)
Angular momentum of the person is always constant with respect to the axis of disc
so it is given as
Part 4)
By angular momentum conservation of the system we will have
Part 5)
Force required to hold the person is centripetal force which act towards the center
so we will have