Question
Sat April 07, 2012 By: Tanmay

if we continue to give a force of 10N on a mass of m kg and taking frictional force and air resistance to be zero,will the once increased velocity will remain constant or it continues to increase due to this force.if not,how a body of mass m kg gets accelarated each time under a constant force of gravity g while it falls from a height.

Expert Reply
Mon April 09, 2012
If you neglect the resistance offered by friction and air, and you continue to give the body of mass m, a constant force of 10N, then in this case, the body will have a constant acceleration whose value is given by a=10/m. Since as long as you continue to give this force of 10N, the body will have this constant acceleration that means its velocity will not remain constant and will continue increasing due to this force applied.
This is the same as the body of mass m falling under gravity has a constant acceleration due to the gravitational force offered by earth and its speed keeps on increasing.
 
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