A vertical pile of mass 150 kg is driven 120 mm into the ground by the blow of a 1100 kg hammer, which falls through 800 mm. assuming the hammer and pile remain in contact, determine the following: i) The velocity of the hammer just before impact ii) The velocity immediately after impact iii) The resistive force of the ground, assuming it to be uniform

A vertical pile of mass 150 kg is driven 120 mm into the ground by the blow of a 1100 kg hammer, which falls through 800 mm. assuming the hammer and pile remain in contact, determine the following: i) The velocity of the hammer just before impact ii) The velocity immediately after impact iii) The resistive force of the ground, assuming it to be uniform