Grade 11Modern Physics
Q. A metallic sphere of mass 1 kG and radius 5cm is welded to the end B of a thin rod AB of length 50 cm and mass 0.5 kG as shown above.
This rod with the sphere will balance horizontally on a knife edge placed at a distance 'x' from the end A of the rod if 'x' is equal to
A) 35cm B) 50cm C) 45cm D) 55cmI know the answer is 45cm but why didn’t we consider the first particle x co-ordinate to be zero?????
Q. A metallic sphere of mass 1 kG and radius 5cm is welded to the end B of a thin rod AB of length 50 cm and mass 0.5 kG as shown above.
This rod with the sphere will balance horizontally on a knife edge placed at a distance 'x' from the end A of the rod if 'x' is equal to
A) 35cm B) 50cm C) 45cm D) 55cm
This rod with the sphere will balance horizontally on a knife edge placed at a distance 'x' from the end A of the rod if 'x' is equal to
A) 35cm B) 50cm C) 45cm D) 55cm
I know the answer is 45cm but why didn’t we consider the first particle x co-ordinate to be zero?????
