Derived Newton’s second law using constant acceleration ( Distance of Free-Fall) and find Work is equivalent...

Question

Question

Derived Newton’s second law using constant acceleration ( Distance of Free-Fall) and find Work is equivalent to KE.

science physics

Answer 1

Answer #1

according to newton's second law

force applied is equal to the rate of change of momentum

F = dp/dt

F = mdv/dt

dv/dt = a

F = ma -------(1)

dW = F*dS

dW = ma *dS

dW = mv(dv/ds)*ds

dW = mv dv

so integrating both sides we have

W = 0.5m(v2^2 - v1^2)

so work done = change in Kinetic energy

Answer 2

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