John drives at 28 m/s for 2800 m. then stops and rests for 300 s. then drives at 25 m/s for 1100 m

Vi. on another planet, a spring with constant 4.7 n/m is set up and allowed to expand verticaly freely. 8.4kg mass is placed on the spring and the spring extends 5.28m. calculate the exected extension on earth.