English Medium Class 9 - CBSE Question Bank Solutions

A batsman hits a cricket ball which then rolls on a level ground. After covering a short distance, the ball comes to rest. The ball slows to a stop because ______.

What do you mean by buoyancy?

In what direction does the buoyant force on an object immersed in a liquid act?

Why are the ceilings of concert halls curved?

Why do organisms need water?

What is the major source of fresh water in the city/town/village where you live?

Why is water essential for life?

What does the slope of a distance-time graph indicate ?

What conclusion can you draw about the speed of a body from the following distance-time graph ?

What can you say about the motion of a body whose distance-time graph is a straight line parallel to the time axis ?

Fill in the following blank with suitable word :

The slope of a distance-time graph indicates ………………….. of a moving body.

Fill in the following blank with suitable word :

The slope of a speed-time graph of a moving body gives its………………………..

What is the other name of Newton’s first law of motion ?

Name the scientist who gave the laws of motion.

Fill in the following blank with suitable word :

Newton’s first law of motion is also called Galileo’s law of ………………………

Name the two quantities, the slope of whose graph give speed .

State Newton’s first law of motion. Give two examples to illustrate Newton’s first law of motion.

A moving bicycle comes to rest after sometime if we stop pedalling it. But Newton’s first law of motion says that a moving body should continue to move for ever, unless some external force acts on it. How do you explain the bicycle case ?

Define one newton force.

Name the physical quantity whose unit is ‘newton’.