Question

A boy of mass 45kg sits 109cm to the left of seesaw. Another boy of mass 29000g wants to balance the seesaw. At what distance he needs to sit?

Answer 1

`d_(2)` = 169 cm

Step-by-step explanation:

Mass 1 = 45 kg => Force = 450 N

Mass 2 = 29 kg => Force = 290 N

According to principle of moments:

=>
`F_(1)d_(1) = F_(2)d_(2)`

Where
`F_(1)` = 450 N,
`d_(1)` = 109 cm and
`F_(2)` = 290 N

=> (450)(109) = 290
`d_(2)`

=> 49050 = 290
`d_(2)`

Dividing both sides by 290

=>
`d_(2)` = 169 cm