ICSE ICSE Class 6 - CISCE Question Bank Solutions for Physics

Answer the following in short.

How can sliding friction be changed into rolling friction easily?

Answer the following in short.

List the various states of matter that offer frictional force?

Answer the following in detail.

Define friction and explain how it is useful to us.

Answer the following in detail.

Write the characteristics of the force of friction?

Answer the following in detail.

Describe three different ways by which friction can be increased to help us in various situations?

State whether the following statement is True or False.

A boy does work while pushing a wall.

State whether the following statement is True or False.

A machine performs work by itself.

State whether the following statement is True or False.

In an ideal machine, work done on load is equal to the work done by effort.

Fill in the blank:

The useful work done by an actual machine is always ............ than the work done on the machine.

Select the correct alternative:

For an ideal machine, the efficiency is

When is work said to be done by a force?

What do you understand by a machine?

What is the principle on which a machine works?

Name six simple machines. Give an example of each machine.

Define the term ‘work input’ and ‘work output’ in relation to a machine.

What is an ideal machine?

Can a machine have an efficiency of 100%? Give a reason to support your answer.

A machine is 75% efficient’. What do you understand by this statement?

Write true or false of the following statement.

Image formed in a pinhole camera is real.

Write true or false of the following statement.

The image in a pinhole camera gets blurred if the hole is made bigger.