Question

Weights of 20kg and 30 kg are suspended from the ends of a light rod 5m long, so at which point the rod must be suspended by means of a string to keep it horizontal?

• A. At 3m from 20kg weight
• B. At 3m from 30kg weight
• C. At 4m from 20kg weight
• D. At 4m from 30 kg weight

Answer 1

The correct option is A At 3m from 20kg weight

Weights of 20kg and 30kg are suspended from

ends of 5 m long

In order to keep the string horizontal

the rod must be suspended at 3m from 20kg

weight. To keep the string horizontal iE

should be on center of the rod.