Description For problem 1, use the work-kinetic energy theorem to determine the
ID: 1791316 • Letter: D
Question
Description For problem 1, use the work-kinetic energy theorem to determine the speed of the pile driver at the moment it hits the steel I beam. Then, starting over with a new free bodyAssignment Scoring diagram, use the work-kinetic energy theorem to determine the work done by the I beam's normal force to slow the pile driver to rest. Once you have the work done by the I beam's normal force, then you can find the magnitude of the force You should find that the I beam's normal force does negative work, so the direction of this force is opposite the displacement. For this assignment you submit answers by question parts. The number of submissions remaining for each question part only changesi you submit or change the answer Your last submission is used for your score For problems 3 and 4, I won't ask you to turn in your results for part (c). For problem 6, the potential energy corresponding to Fx is U(x) =-x2-4x. This potential energy is found by integrating the negative of the force across dx. The upcoming exam won't ask you to integrate the negative of a force to find corresponding potential energy, but it will ask you to take the negative derivative of potential energy to find the corresponding force 1. -1 points SerPSE9 7.P035 MI My Notes Ask Your Teacher A 1 900-kg pile driver is used to drive a steel I-beam into the ground. The pile driver falls 4.80 m before coming into contact with the top of the beam, and it drives the beam 14.4 cm farther into the ground before coming to rest. Using energy considerations, calculate the average force the beam exerts on the pile driver while the pile driver is brought to rest. magnitude directionelect--Explanation / Answer
By using Conservation of energy,
Work = Change in Kinetic Energy
mg(h+d) - Fd = 0
F = mg(h+d)/d
= 1900*9.8*(4.80+0.144)/0.144
= 639286.67 N answer