A particle which is experiencing a force, given by vecF = 3 veci - 12 vecj , undergoes a displacement of vecd = 4 veci . 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 ?

Question

A particle which is experiencing a force, given by vecF = 3 veci - 12 vecj , undergoes a displacement of vecd = 4 veci . 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 ? (A) 15 J (B) 10 J (C) 12 J (D) 9 J

Tardigrade Admin · Accepted Answer

Work done = vecF . vecd = 12 J work energy theorem wnet = Δ K.E. 12 = Kf - 3 Kf = 15 J

Q. A particle which is experiencing a force, given by $F = 3 i - 12 j$ , 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 ?

15 J

10 J

12 J

9 J

Work done $= F . d$
= $12 J$
work energy theorem
$w_{n e t} = Δ K . E .$
$12 = K_{f} - 3$
$K_{f} = 15 J$

Q. A particle which is experiencing a force, given by F=3i−12j​ , undergoes a displacement of d=4i . If the particle had a kinetic energy of 3J at the beginning of the displacement, what is its kinetic energy at the end of the displacement ?

15 J

10 J

12 J

9 J

Work done =F.d = 12J work energy theorem wnet​=ΔK.E. 12=Kf​−3 Kf​=15J

Q. A particle which is experiencing a force, given by $F = 3 i - 12 j$ , 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 ?

Work done $= F . d$
= $12 J$
work energy theorem
$w_{n e t} = Δ K . E .$
$12 = K_{f} - 3$
$K_{f} = 15 J$