What is the kinetic energy of the object if the net work is zero?

The net work done by all forces acting on an object is equal to the kinetic energy change of that object. If the net work is zero, that means there is no kinetic energy change.

Why do we say work done against gravity is zero?

Work done on the body when we lift it and put it on the table is zero, because according to work energy theorem, change in kinetic energy of the body is zero. So, the net work done is zero.

When zero work is done on an object the kinetic energy of the object is zero and the object stops?

The work done is equal to the change in kinetic energy. So if the net work done on an object is zero, its change in kinetic energy is also zero. Thus, the speed of the object will remain the same.

What does it mean for work done to be zero?

Section Summary. Work is the transfer of energy by a force acting on an object as it is displaced. The work done by a force is zero if the displacement is either zero or perpendicular to the force.

What is the meaning of work done against gravity?

Work done against the gravity: Work done by a body is against the applied force if the displacement is in a direction opposite to the force. In the case of gravity, if a body is lifted above the ground, work is done against gravity.

What is work done against gravity?

Section Summary. Work done against gravity in lifting an object becomes potential energy of the object-Earth system. The change in gravitational potential energy, ΔPEg, is ΔPEg = mgh, with h being the increase in height and g the acceleration due to gravity.

What is the work done in bringing a test charge from infinity to point o?

It would take an infinite amount of work to bring the charge to r=0 where Q is, regardless of whether you start infinitely far away or finitely far away. The repulsive force between the two charges gets infinitely strong as they get infinitely close, and you have to work against it.

What do you mean by zero potential?

Definition of zero potential 1 : the ideal potential of a point infinitely distant from all electrification. 2 : the actual potential of the surface of the earth taken as a point of reference — compare ground sense 7b.