1.

12 A body of mass 6 kg under a force which causest2displacement in it given 'Smetres wh4ere 't'is time. The work done by the force in 2 secondsis :-(1) 12J(2) 9J(3) 6J(4) 3J

Answer»

After 2sS = t^2/4S = 1m

v = dS/dtv = 2t/4v = t/2

a = dv/dta = 1/2 m/s^2

F = maF = 6*1/2F = 3N

W = F * SW = 3 * 1W = 3J

option (4) is correct.



Discussion

No Comment Found

Related InterviewSolutions