Mass of an object = 5 kg,
displacement covered by the object due to force (d) = 5 m,
Work done against the friction (W) =?
We know that the, work done against the friction (W) = force × displacement
= m×gxd [ Force = mass × acceleration due to gravity ]
= 5×10×5 [ g = 10 m/s2 ]
= 250 joules
Hence, the work done against friction is 250 joules.