Chapter 12 Simple Machines Solutions

Maharashtra State Board Class 6 Science Solutions Chapter 12 Simple Machines

Class 6 Science Chapter 12 Simple Machines Textbook Questions and Answers

1. Classify the following as a lever, a pulley and an inclined plane:
(A wedge, a needle, a staircase, a slide, the wheel of a flagpole, nutcrackers, scissors, an opener, an axe, a crane, a knife)

Question a.
Classify the following as a lever, a pulley and an inclined plane:
(A wedge, a needle, a staircase, a slide, the wheel of a flagpole, nutcrackers, scissors, an opener, an axe, a crane, a knife)
Answer:

2. Fill in the blanks using the proper word and complete the statements.

Question a.
The ………….. in the centre, the ………….. on one side and the on the ………….. other side make a lever of the first order.
Answer:
Fulcrum, load and effort

Question b.
The ………….. in the centre, the ………….. on one side and the ………….. on the other side make a lever of the second order.
Answer:
Load, fulcrum, effort

Question c.
The ………….. in the centre, the ………….. on one side and the ………….. on the other side make a lever of the third order.
Answer:
Effort, fulcrum, load

3. Which machines will you use to do the following work? Write their types.

Question a.
To remove the lid of a tin. Opener Lever of the second order
Answer:

Question b.
To lift bricks to the top of a tall building Crane Complex machine
Answer:

Question c.
To cut vegetable Knife Wedge – Simple machine
Answer:

Question d.
To draw water from a well Pulley Simple machine
Answer:

Question e.
To hold a papad for roasting it. A pair of tongs Lever of the third order
Answer:

4. Write the answers to the following questions in your own words.

Question a.
What is meant by a simple machine?
Answer:

Question b.
Mention the advantages of using a machine.
Answer:

Question c.
What is meant by a complex machine?
Answer:

Question d.
What is a lever? How is the order of the lever determined?
Answer:

5. Why is this so?

Question a.
Traveller’s bags have wheels.
Answer:

Question b.
Machines have to be maintained.
Answer:

Question c.
A bicycle is said to be a complex machine.
Answer:

6. 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 sea-saw in a garden. In the mean time, 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.

Question a.
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 sea-saw in a garden. In the mean time, 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.
Answer:
Levers:

Activity:

Fill in the blanks.