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Question

In which of the following ways does the machine help us?


A

In lifting heavy load by using less effort.

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B

Loss in speed.

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C

Changing the direction of effort.

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D

Both A and C

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Solution

The correct option is D

Both A and C


The four ways in which machines help us are:

1. In changing the point of application of force to a convenient point.

2. In changing the direction of effort to a convenient direction.

3. In lifting heavy load by applying less effort.

4. For obtaining a gain in speed by smaller movement of effort.


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