Question # 3 In the following figure, XY is a see - saw of 4 metres length. It is pivoted at its midpoint Z.
calculate the anticlockwise moment, about a horizontal axis passing through Z, of a child of weight
230 Newton who sits:

X. Z. Y

a. At X
b. 0.5 m from X
X
c. At Y
d. At Z and explain why it is acting that way​

Explanation:

The moment of A about B is given by the formula

where M is the moment, F is the force acting perpandicular to the axis of rotation about B by A, and d is the horizontal distance of A from B along the axis of rotation.

Now

(a) At X,

(b) At 0.5m from X,

(c) At Y,

where negative sign indicates clockwise rotation of the child about Z.

(d) At Z,

answer: a) y=-8x+5

a) m= -8

b) m= -2

c) m= 7

d) m= 6

elctricity and magnet is conversion to it