Answer:
The time of flight of the ball is 1.06 seconds.
Explanation:
Given
Also,
Let us say the velocity in the x-direction is and in the y-direction is
. And acceleration in the x-direction is
and in the y-direction is
.
Also, is distance covered in x and y direction respectively. And
is the time taken by the ball to hit the backboard.
We can write . Where
is velocity of ball.
Now,
Also,
.
Plugging this value in
So, the time of flight of the ball is 1.06 seconds.
Answer and Explanation:
This experiment is known as Lenz's tube.
The Lenz tube is an experiment that shows how you can brake a magnetic dipole that goes down a tube that conducts electric current. The magnet, when falling, along with its magnetic field, will generate variations in the magnetic field flux within the tube. These variations create an emf induced according to Faraday's Law:
This emf induced on the surface of the tube generates a current within it according to Ohm's Law:
This emf and current oppose the flux change, therefore a field will be produced in such a direction that the magnet is repelled from below and is attracted from above. The magnitude of the flux at the bottom of the magnet increases from the point of view of the tube, and at the top it decreases. Therefore, two "magnets" are generated under and above the dipole, which repel it below and attract above. Finally, the dipole feels a force in the opposite direction to the direction of fall, therefore it falls with less speed.
