Two spherical bobs, one metallic and the other of glass, of the same size are allowed to fall freely from the same height above the ground. Which of the two would reach earlier and why?

Open in App

Solution

A glass bob is non-conducting, while a metallic bob is conducting. Due to the non-conducting nature of the glass bob it will only experience the Earth's gravitational pull. So, the glass bob will reach the ground earlier. Because of its conducting nature. Eddy current is induced in the metallic bob as it falls through the magnetic field of the Earth. By Lenz's law, the current induced is such that it opposes the motion of the metallic bob. So, the metallic bob will experience a force in the upward direction. This will slow down the metallic bob by some extent. Hence, it will reach the Earth after the glass bob.

Suggest Corrections

Similar questions

Q. Two particle held at different height

a

and

b

above the ground are allowed to fall from rest. The ratio of their velocities on reaching the ground is

Q. Two objects on moon, of different masses are released from same height at some instant simultaneously and are falling freely. Both would:

Q. A metal ball of mass

2 k g

is allowed to fall freely from rest from a height of

5 m

above the ground (Take

g = 10 m s^{- 2}

). After the ball hits the ground and comes to rest, mechanical energy is converted to:

Two objects of different masses falling freely near the surface of Moon from same height would

there are two balls of 50kg and 10kg. They both are dropped of same height. They both are spherical iron balls(volumes are not same). air resistance is there. which ball will reach the ground first and why?

Join BYJU'S Learning Program