A pendulum has 573 J of potential energy at the highest point of its swing. How much kinetic energy will it have at the bottom o
1 answer:
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Answer: C) 200 N
Explanation:
The force is defined as:
Where:
is the mass of the object
is the acceleration
Then:
Finally:
Hence, the correct option is C.
Explanation:
It is given that, a long, straight wire is surrounded by a hollow metal cylinder whose axis coincides with that of the wire.
The charge per unit length of the wire is and the net charge per unit length is
.
We know that there exist zero electric field inside the metal cylinder.
(a) Using Gauss's law to find the charge per unit length on the inner and outer surfaces of the cylinder. Let are the charge per unit length on the inner and outer surfaces of the cylinder.
For inner surface,
For outer surface,
(b) Let E is the electric field outside the cylinder, a distance r from the axis. It is given by :
Hence, this is the required solution.