The objects are at equal distances from the pivot..
Which property of the objects need not be the same?
a) The mass.
b) The moment about the pivot.
c) The volume.
d) The weight.
2007-11-23 23:21:06 · 6 answers · asked by Princess of Death 1 in Science & Mathematics ➔ Physics
b) The moment about the pivot.
Because the principle of moments says for an object to be in equilibrium sum of moments about any to be zero.
Therefore, clockwise moments must be equal to the anticlockwise moments .
why d is wrong because he did not specify where the objects are on the beam ,i mean to say where on the beam . the two objects can be at the same place being equal disatnce from the pivot .
2007-11-23 23:43:58 · answer #1 · answered by Murtaza 6 · 0⤊ 0⤋
Strewth. The only person to give the correct answer was the first guy.
The volume is unimportant - For the beam to be in balance the total force acting on each side must be equal and for that to happen the mass x distance must be the same on each side.
The SIZE of the object on each side is totally unimportant.
2007-11-24 07:56:21 · answer #2 · answered by Kieran B 4 · 1⤊ 0⤋
if they are in equilibrium and at the same distance from the pivot the two weights need to be equals,if the distance changes,we need equal moments to have the equilibrium.ok!
2007-11-24 07:33:54 · answer #3 · answered by Heisenberg 4 · 0⤊ 1⤋
the Weight; being equal distances, then the force of each object pressing down has to counter act the other. equal volume isn't correct if you had a cup full of lead, and a cup full of feathers. the feathers would be flying without the bird.
2007-11-24 07:35:30 · answer #4 · answered by Gregory J 2 · 0⤊ 1⤋
c) Volume
2007-11-24 07:24:18 · answer #5 · answered by iceman 7 · 1⤊ 1⤋
a) and/or c)
2007-11-24 07:30:41 · answer #6 · answered by JAKE 1 · 0⤊ 1⤋