A30 kg girl sits on a seesaw 4.0 m from the fulcrum. what distance from the fulcrum should a 40kg boy sit in order to balance the seesaw

The answer is 3m

Explanation:

This question has to do with balancing of moment

The moment of force about the fulcrum

Given the mass of the girl =30kg

To force Fg=30*10=300N

Distance of girl from fulcrum l= 4m

Mass of boy 40kg

TO force Fb=40*10=400N

Distance of the boy from fulcrum =?

We know that moment of force about a point M=force*distance

I.e M=f*l

For the boy to cause a balance

His moment must be equal to that of the girls

Therefore

Fg*l=Fb*l

300*4=400*l

1200=400l

L=1200/400

L=3m

Hence the boy must seat 3m away from the fulcrum to balance the seesaw

What is a moment?

A moment is a turning force about a point, The moment is equal to the magnitude of the force multiplied by the perpendicular distance between its line of action and the axis of rotation

we need some answer choices, or something like that

explanation:

answer; i believe the correct answer is (40,000 j) good luck