Question

The distance from the top of the column (where the magnet was dropped from) to the first coil was 35.2cm (happened at t=0.50s), the distance from the top to where the magnet passed the second coil was 81.0cm (happened at t=0.70s). The emf recorded when the magnet passed the first coil was 0.124, and when the magnet passed the second coil, the emf was 0.192.

To find the velocity of the magnet when it passed the first magnet and when it passed the second magnet, do I use kinematics? Is it correct to assume acceleration=9.8m/s^2? Thanks

Answer 1

es. In order to calculate the velocity of the magnet in the cases mentioned as above, one can follow kinematics and proceed. One can use Newton's laws of motion under gravity in this case. Since the whole problem scenario is analogous to the problem of two balls being dropped from a certain height, one can use the Newton's equation of motion - S= ut + 1/2 at^2.

Here, U needs to be calculated and the values of S and t are already mentioned in the problem. It is correct to assume the value of g as 9.8 m/s^2 as that is the standard calculated and average value for acceleration due to gravity. For further simplification one can assume the value of g to be 10 m/s^2.