a 1810 kg pile driver is used to drive a steel i-beam into the ground. the pile driver falls 2.04 m before contacting the beam, and it drives the beam 16.4 cm into the ground before coming to rest. find the magnitude of the average force the beam exerts on the pile driver while the pile driver is brought to rest. the acceleration of gravity is 9.8 m/s 2 . answer in units of n.