100+ RRB NTPC General Awareness Questions and Answers - 1

Question: 1

Name the types of equilibrium?

There are three types of equilibrium.

They are

Stable equilibrium

Unstable equilibrium

Neutral equilibrium

Question: 2

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.

Question: 3

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.

Question: 4

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.

Question: 5

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.