Eduprobe
Question:
A particle experiencing a force given by →F=3→i−2→j undergoes a displacement of →d=4→i. If the particle had a kinetic energy of 3 J at the beginning of the displacement, what is its kinetic energy at the end of the displacement?
12 J
9 J
10 J
15 J
Solution:
The correct option is A 15 J
Work done = →F.→d=12J
work energy theorem
wnet=ΔK.E.
12=Kf−3
Kf=15J