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Joeal
Answers (1)
mass=0.5 kg force=5 N f=ma a=force/mass a=5/0.5 a=10m/s^2 u=0 s=4m v^2-u^2=2as v^2=2*10*4 v^2=80 final velocity = v = 8.9m/s kinetic energy = 0.5*m*v^2=0.5*0.5*80 =20 gain in kinetic energy= final kinetic energy -initial kinetic energy =20-0=20
