Balbharati solutions for जनरल सायन्स [इंग्रजी] इयत्ता ६ महाराष्ट्र राज्य मंडळ chapter 12 - Simple Machines [Latest edition]

Classify the following as a lever, a pulley and an inclined plane:

A wedge

Classify the following as a lever, a pulley and an inclined plane:

A needle

Classify the following as a lever, a pulley and an inclined plane:

A staircase

Classify the following as a lever, a pulley and an inclined plane:

A slide

Classify the following as a lever, a pulley and an inclined plane:

The wheel of a flagpole

Classify the following as a lever, a pulley and an inclined plane:

Nutcrackers

Classify the following as a lever, a pulley and an inclined plane:

Scissors

Classify the following as a lever, a pulley and an inclined plane:

An opener

Classify the following as a lever, a pulley and an inclined plane:

An axe

Classify the following as a lever, a pulley and an inclined plane:

A crane

Classify the following as a lever, a pulley and an inclined plane:

A knife

The ______ in the centre, the ______ on one side and the ______ on the other side make a lever of the first order.

The ______ in the centre, the ______ on one side and the ______ on the other side make a lever of the second order.

The ______ in the centre, the ______ on one side and the ______ on the other side make a lever of the third order.

Which machine will you use to do the following work? Write their type.

To remove the lid of a tin.

Which machine will you use to do the following work? Write their type.

To lift bricks to the top of a tall building.

Which machine will you use to do the following work? Write their type.

To cut vegetables.

Which machine will you use to do the following work? Write their type.

To draw water from a well.

Which machine will you use to do the following work? Write their type.

To hold a papad for roasting it.

What is meant by simple machines?

Mention the advantages of using a machine.

What is meant by complex machines?

What is a lever? 

How are the orders of the lever determined?

Why is this so traveller’s bags have wheels?

Why is this so machines have to be maintained?

Why is this so a bicycle is said to be a complex machine?

Name the levers mentioned in the following passage. Identify the fulcrum, load, and effort of each and say which type of lever it is.

Ravi and Savita sit on a seesaw in a garden. In the meantime, a gardener is trimming trees in the garden. He puts the leaves and other garbage in the wheelbarrow. Later, Ravi gets thirsty and he buys lemon sherbet. The sherbet seller cuts the lemon and squeezes it using a lemon squeezer. He puts small pieces of ice in the glass with the help of the tongs.