Work = 196 J = 196 kg.m^2.s^-2
[We know that 1J = 1 kg.m^2.s^-2]
Displacement = 2m
Acceleration (g) = 9.8ms^-2
We know that,
W=Fs and F=ma
So, W = (ma)s
=> W = m×a×s
=> 196 kg.m^2.s^-2 = m×9.8ms^-2×2m
=> 196 kg.m^2.s^-2 = m×19.6m^2.s^-2
=> 196 kg.m^2.s^-2 = m×19.6m^2.s^-2
=> (196 kg.m^2.s^-2)/(19.6m^2.s^-2) = m
=> 10kg = m
So, mass = 10kg
