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General
Easy
Question
A small ball B of mass m is suspended with light inelastic string of length L from a block A of same mass m which can move on smooth horizontal surface as shown in the figure. The ball is displaced by angle 
from equilibrium position & then released.
The displacement of block when ball reaches the equilibrium position is
- L
- none of these
The correct answer is:
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A block of mass m starts from rest and slides down a frictionless semi–circular track from a height h as shown. When it reaches the lowest point of the track, it collides with a stationary piece of putty also having mass m. If the block and the putty stick together and continue to slide, the maximum height that the block-putty system could reach is:
A block of mass m starts from rest and slides down a frictionless semi–circular track from a height h as shown. When it reaches the lowest point of the track, it collides with a stationary piece of putty also having mass m. If the block and the putty stick together and continue to slide, the maximum height that the block-putty system could reach is:
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Lines of force run from ___ to ___ outside the magnet
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A liquid is taken in a density bottle and its mass is determined as 20 g whereas mass of water whose volume is equal to that of liquid at 4°C is 10 g. Then the density of liquid is
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