In which situation is zero net work done on the object?

In which situation is zero net work done on the object?

If the constant velocity is horizontal (sliding a book across a table) and there is friction, then work is done against friction. That is because a force in the direction of the motion, equal and opposite the force of the friction, was required to nullify the friction yielding a net force of zero.

What happens to the speed on an object if the net work done on zero?

The answer is d). Work is the change in kinetic energy, so if work is zero, kinetic energy is fixed and speed is fixed.

When an object is lifted from the ground the work done is?

The net force on the object is zero. The force you are exerting is equal in magnitude and opposite in direction to the force of gravity. As you are lifting the object you are doing work on the object. The work W done on an object by a constant force is defined as W = F·d.

Can work done be 0?

Zero work is done when the displacement of a body is zero or perpendicular (θ=900,cosθ=0) to the direction of force applied, then work done is zero. However, the displacement is in the horizontal plane. Thus, the force applied and the displacement are in perpendicular directions. So, the work done is zero.

Is net work done always zero?

internal force(chemical energy) , brings a change in Kinetic energy.. Net work done by tension of an ideal thread on its adjoining bodies is always zero.

What is the zero of potential energy?

The potential energy U of a body at some point x is defined to be the work done on the object by an extra, imposed force to move it from a reference position to its current position. The reference point is called the “zero point” of potential energy as the potential energy will be zero there by definition.

How will an object possesses a zero potential energy?

We do this by rewriting the potential energy function in terms of an arbitrary constant, For example, the lowest height in a problem is usually defined as zero potential energy, or if an object is in space, the farthest point away from the system is often defined as zero potential energy.

How much work is done by the net force?

Section Summary. The net work Wnet is the work done by the net force acting on an object. Work done on an object transfers energy to the object. The translational kinetic energy of an object of mass m moving at speed v is KE=12mv2 KE = 1 2 m v 2 .

What can be said about the speed of a particle if the net work done on it is zero explain your answer?

Its speed is unchanged.