KE = 1/ 2 * 1252 * 144
as KE = 1/2 * m * v ^2
= 90144 J
Answer:
Explanation:
The sum of torque on the sphere is:
Solving for a:
Now, the sum of forces will be:
Solving for Ff:
Ff=-6.42N The negative sing tells us that it actually points downwards.
To solve this problem we will apply the concepts related to the induced voltage or electromotive force. Said force is equivalent to the variation of the magnetic flux over time, and in turn, said flux could be expressed in terms of the cross-sectional area and the magnetic field. Under these relationships and our values we will find the finally desired value.
The induced emf is,
We have:
And
Then
Here,
r = The distance from the axis
R = Radius of the solenoid
Rearrange for
Replacing,
A- reflection B- refraction C- refraction D- reflection E- reflection F- refraction