Work, Power and EnergyHard
Question
A block of mass 2 kg is free to move along x-axis. It is at rest and from t = 0. Onwards it is subjected to a time dependent force F(t) in x-direction. The force F(t) varies with t as shown in the figure. The kinetic energy of the block after 4.5 second is :-
Options
A.4.50 J
B.7.50 J
C.5.06 J
D.14.06 J
Solution
Impulse = 6 - 1.5 = 4.5 N.s = Pf
W =
mvf2 = 
= 5.06 J
W =
mvf2 = = 5.06 JCreate a free account to view solution
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