[填空题]
An energy-absorbing car bumper has a spring c -o5qb9mev9q stiffness constant ohqrry. zxou*3c6( 0 nxf 550 kN/m Find the maximum compression of the bumper if the car, with mass 1500 kg, collides with a wall at a speed of 2.2 m/s (approximately 5 mi/h). [H0(rqnxr.houyz*3 6 xcint: Use conservation of energy.] m