Do these examples represent unbalanced or balanced forces?
1 answer:
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Answer:
Explanation:
Given
mass of children
distance between two children
suppose small child is at a distance of x m from pivot point
so torque of small child and heavier child must be equal
Answer:
The block has an acceleration of
Explanation:
By means of Newton's second law it can be determine the acceleration of the block.
(1)
Where represents the net force, m is the mass and a is the acceleration.
(2)
The forces present in x are and
(the friction force):
Notice that subtracts to
since it is at the opposite direction.
The forces present in y balance each other:
Therefore:
(3)
But and writing (3) in terms of a it is get:
So the block has an acceleration of .
