EASY
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Choose the odd one out.

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Important Questions on Functions

HARD

The diagram below shows a pulley arrangement:

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Copy the diagram and mark the direction of tension on each stand of the string.
What is the velocity ratio of the arrangement?
If the tension acting on the string isT, then what is the relationship between T and effort E?
If the free end of the string moves through a distance x, find the distance by which the load is raised.

EASY
Name a machine to change the point of application of force?
EASY
Only complex machines make our work easier.
MEDIUM
Define a simple machine. Name the six types of simple machines.
MEDIUM

Read the clues and fill up the crossword:

Across:

1. A nail with grooves.

2. A push or pull.

3. A rod fixed at one end.

4. A wheel that rotates with a rope.

5. Method to reduce friction in machines.

Down: 

6. A wheel that spins on a bar.

2. A force that stops movement.

7. A change bought by applying force.

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HARD
Complex machines are made up of multiple simple machines. Discuss.
MEDIUM

Find four types of simple machines from the following word puzzle.

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EASY
Explain why scissors for cutting cloth may have blades longer than the handles, but shears for cutting metals have short blades and long handles.
EASY
What do you understand by an ideal machine? How does it differ from a practical machine?
MEDIUM
A doorknob is an example of:
EASY
What is a machine?
MEDIUM
Name the six simple machines giving an example for each.  
EASY
The fixed point around which the rod (in a lever) moves is called.
EASY
A device that makes our work easier and faster is called a simple _____.
EASY
Name a machine to multiply force?
EASY
A simple machine can make our work easier.
HARD

Recall and complete the concept map given below.

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EASY
Cotyledons are also called-
EASY
Name a machine to obtain gain in speed?
MEDIUM

Complete the concept map.

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