What is net work done in physics?

Net work done is defined as the change in the kinetic energy on an object.It is related to the work energy theorem which says that the work done byh a force on a moving body is equal to the increase in its kinetic energy.It is measured by the formula:- W =1/2mv^2-1/2mu^2.

How do you find net work done in physics?

The formula for net work is net work = change in kinetic energy = final kinetic energy – initial kinetic energy. The work energy theorem, this is a theorem that states the net work on an object causes a change in the kinetic energy of the object.

How do you calculate speed using work energy theorem?

The work-energy theorem says that this equals the change in kinetic energy: −mg(yf−yi)=12(v2f−v2i). (yf−yi)=(sf−s−i)sinθ, so the result for the final speed is the same.

How to explain the work-energy theorem in physics?

Explain work as a transfer of energy and net work as the work done by the net force. Explain and apply the work-energy theorem. What happens to the work done on a system?

How is kinetic energy related to net work?

Section Summary 1 The net work Wnet is the work done by the net force acting on an object. 2 Work done on an object transfers energy to the object. 3 The translational kinetic energy of an object of mass m moving at speed v is \\ (\ext {KE}=\\frac {1} {2}mv^ {2}\\\\\\). 更多结果…

How to calculate the work done by a force?

(a) A graph of F cos θ vs. d, when F cos θ is constant. The area under the curve represents the work done by the force. (b) A graph of F cos θ vs. d in which the force varies. The work done for each interval is the area of each strip; thus, the total area under the curve equals the total work done.

How to calculate the kinetic energy of a conveyor system?

Suppose a 30.0-kg package on the roller belt conveyor system in Figure 3 is moving at 0.500 m/s. What is its kinetic energy? Because the mass m and speed v are given, the kinetic energy can be calculated from its definition as given in the equation KE = 1 2mv2 KE = 1 2 m v 2. The kinetic energy is given by KE = 1 2mv2 KE = 1 2 m v 2.