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(1) state the mathematical expression for the movement of force :-
in picture...
(2) state the mathematical expression for the movement of couple ..
The resultant of a number of couples is their algebraic sum. A couple CANNOT be put in equilibrium by a single force! A couple can only be put in equilibrium by a moment or another couple of equal magnitude and opposite direction anywhere in the same plane or in a parallel plane.
(3) when is the moment of force positive
in picture....
(4) what is the weight of the body at the centre of the earth
It would be zero. The weight of an object is the maximum at the surface of the earth. As you move the body closer to the center of the earth, the mass of the earth between the center of the earth and the body keeps decreasing. This causes the force acting from the center of the earth on the body to decrease
this is your answer....
in picture...
(2) state the mathematical expression for the movement of couple ..
The resultant of a number of couples is their algebraic sum. A couple CANNOT be put in equilibrium by a single force! A couple can only be put in equilibrium by a moment or another couple of equal magnitude and opposite direction anywhere in the same plane or in a parallel plane.
(3) when is the moment of force positive
in picture....
(4) what is the weight of the body at the centre of the earth
It would be zero. The weight of an object is the maximum at the surface of the earth. As you move the body closer to the center of the earth, the mass of the earth between the center of the earth and the body keeps decreasing. This causes the force acting from the center of the earth on the body to decrease
this is your answer....
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rockingstar16:
Thanks
and u did not send the answer for my 4th question
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