Question: Do you think the object is still moving if the net force on an object is zero.
Yes the object is still moving if the net force on an object is zero.
Example:
The first condition for equilibrium does not ensure that a body is in equilibrium. This is clear from following example. Consider a body pulled by the force F1 and F2
(a) the two force is equal but opposite to each other. Both are acting along the same line hence their results will be zero. According to the first condition the body will be in equilibrium. Now shift the location of the force as shown
(b) in
this situation the body is not in equilibrium the although the first
condition of equilibrium is still satisfied. It is because the body has the
tendency to rotate. The situation is another condition for equilibrium in addition
to the first condition for equilibrium. This is called the second condition for
equilibrium.
(a)
Two
equal to opposite forces acting along the same lines.
(b) Two equal opposite
forces acting along different lines
A body continues its state of rest or of uniform motion in a straight line
provided no net force acts on it.
Newton first law state that if a body
is at a rest or moving at a constant speed in a straight line, it will remain at
rest or keep moving in a straight line at constant speed unless it is acted
upon by a force. In fact, in a classical Newtonian machine, there is no important distinction between rest and uniform motion in a straight line they may be
regarded as the same state motion seen by different observes one moving at the
same velocity s the particle another moving and constant velocity with respect to
the particle.
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