Weight = mass x gravitational field
= 6kg x 10N/kg
= 60N
Weight = mass x gravitational field
= 70kg x 10N/kg
= 700N
the pivot will be at the man's foot
Anti-clockwise moment = Clockwise moment.
So, we can substitute, when we find the value of one of the moment - either clockwise or anti-clockwise.
man
Anti-clockwise moment = force x distance
= 700N x 0.9
= 630Nm
load
Anti-clockwise moment= 60x(0.9+0.3)
= 60 x 1.2m
=70Nm
total moment is 702Nm (630+70)
As a result, we now know the moment of the clockwise moment, enabling us to find the upward force.
Moment= force x distance
= ?N x 1.3m
702Nm = ?N x 1.3
divide by 1.3 both side
540N =?N
Force is 540N
Hope this helps!
