100+ RRB NTPC General Awareness Questions and Answers - 1
Name the types of equilibrium?
There are three types of equilibrium.
What is meant by steam lining?
Shaping a body so as to reduce friction is called steam lining.
Example – The shape of boats, ships, planes etc are made suitable to reduce friction and to move freely.
What is sliding friction?
When one body moves slowly or slides over another body, force of friction is known as the dynamic friction or sliding friction.
Define efficiency of a simple pendulum?
Efficiency of a simple machine is the ratio of the work done by the machine to the work done on the machine.
Efficiency = Work done by the machine / Work done on the machine.
Define centre of gravity?
The centre of gravity of an object is defined as a fixed point through which the entire weight of the object acts irrespective of the position of the object.
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