(a) For a particle simultaneously subjected to the constant forces ( F_1, F_2, , F_n…
PHYSICS · Subjective · CBSE · Physics · Work, Energy and Power · Work, Energy and Power
Problem
(a) For a particle simultaneously subjected to the constant forces F1,F2,…,Fn and displaced by s, derive an expression showing that the total work done equals the dot product of the resultant force with the displacement.
(b) Three forces act on a particle: F1=7^−4^N,F2=−3^+6^N,F3=2^+5^N. If the particle undergoes a displacement s=5^+2^m, calculate:
(i) the resultant force,
(ii) the net work done.
(c) If the mass of the particle is 2\,kg and it was initially at rest, find its speed after the displacement, assuming no other forces act.