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Why Objects Float or Sink

A tunnel is d...

Question

A tunnel is dug into earth from one end to another passing through the center of earth. A ball is dropped in the tunnel from the surface. Choose the correct options.

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Q. A ball of mass m is dropped from a height h equal to the radius of the earth above the tunnel dug through the earth as shown in the figure. Choose the correct options.

Q. A ball of mass

m

is dropped from a height

h

equal to the radius of the earth above the tunnel dug through the earth as shown in the figure. Choose the correct options. (Mass of earth

= M

Q. A diametrical tunnel is dug across the earth. A ball is dropped into the tunnel from one side. The velocity of the ball when it reaches the centre of the earth is

Q. A diametrical tunnel is dug across earth. A ball is dropped into tunnel from one side. The velocity of the ball when it reaches other end is.

Q. A smooth and bottomless tunnel is dug through the centre of earth. A particle is released from the surface of earth into the tunnel. Time to reach centre of tunnel is (approximately) equal to (where

R =

Radius of earth).

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