A particle of mass m at rest is acted upon by a force F for a time t. Its kinetic energy after the interval t is

Question

A particle of mass m at rest is acted upon by a force F for a time t. Its kinetic energy after the interval t is (A) 2 Ftm (B) (2 F t/m) (C) (F t/m) (D) (F2 t2/2 m)

Tardigrade Admin · Accepted Answer

E=(P2/2 m)=((F t)2/2 m) F=(P/t) E=(F2 t2/2 m)

Q. A particle of mass $m$ at rest is acted upon by a force $F$ for a time t. Its kinetic energy after the interval $t$ is

$2 Ft m$

$\frac{2 Ft}{m}$

$\frac{Ft}{m}$

$\frac{F ^{2} t ^{2}}{2 m}$

$E = \frac{P ^{2}}{2 m} = \frac{( Ft ) ^{2}}{2 m} {F = \frac{P}{t}}$
$E = \frac{F ^{2} t ^{2}}{2 m}$

Q. A particle of mass m at rest is acted upon by a force F for a time t. Its kinetic energy after the interval t is

2Ftm

m2Ft​

mFt​

2mF2t2​