Question

Q. define work derive work energy equation?​

Answer 1

Answer:

Suppose a constant net force Fnet acts on an object of mass m over some distance delta x. Newton's Second Law tells us that the object will have an acceleration a = Fnet/m. If the object's initial velocity was vo and its final velocity is v, kinematics tells us that:

v squared = v sub 0 squared etc.

Multiplying both sides of this equation by the object's mass, m, gives:

m times v squared, etc.

Rearranging:

2 m a delta x = etc.

Since Fnet = ma (Newton's Second Law), we can substitute:

2 Fnet delta x = etc.

then divide both sides of the equation by 2:

thanks!

Answer 2

Derivation Of Work Energy Theorem. The derivation of work-energy theorem is provided here. The work-energy theorem also known as the principle of work and kinetic energy states that the total work done by the sum of all the forces acting on a particle is equal to the change in the kinetic energy of that particle

The work W done by the net force on a particle equals the change in the particle's kinetic energy KE: W=ΔKE=12mv2f−12mv2i W = Δ KE = 1 2 mv f 2 − 1 2 mv i 2 .