Question

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

• A. In lifting heavy load by using less effort.
• B. Loss in speed.
• C. Changing the direction of effort.
• D. Both A and C

Answer 1

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.