PHYSICS [2 Mark Question Answer]

Conditions for a beam balance to be true are
1. Both the pans must be of equal weights.
2. Both the arms must be of equal lengths.

A simple pendulum consists of a heavy point mass (called the bob) suspended by a massless and an inextensible or non-elastic thread from a fixed point or rigid support.

One standard kilogram is equal to the mass of a cylinder of nearly the same height and diameter and made up of platinum and iridium alloy.

The units which can neither be derived from one another nor can they be further resolved into other units are known as fundamental units. Some of the fundamental units are metre (length), kilogram (mass), second (time), Kelvin (temperature), ampere (current), etc.

Wall clock with a pendulum will run at a faster rate in winter as its pendulum rod gets shorter and the pendulum will swing at a faster rate thus the clock would run faster in winters.

The units which can neither be derived from one another nor can they be further resolved into other units are known as fundamental units.

A screw is threaded to twist in when turned with a screwdriver while nails are smooth to slide in straight when pounded with a hammer.

The material used for making screw gauge is stainless steel to avoid expansion and contraction due to change in weather as stainless steel absorbs a little heat.

Screw gauge consists essentially of a screw with a uniform pitch which moves in a nut, thus it is named as screw gauge because the major working part is a screw.