Question3: Score 0/1 A train stop is a very large spring that is placed at the end of the railroad tracks to stop a train from going off the tracks. The spring constant of the train stop is 400,000 N/m. A train of mass 400,000 kg has lost its brakes and is traveling at 0.03 m/s when it makes contact with the train stop. How much does the spring compress in order to stop the train? Your response Correct response 0.00045 Auto graded Grade: 0/1.0 @ m What is the maximum decceleration of the train? Your response Correct response -0.00045 Auto graded Grade: 0/1.0 @ m/s * Total grade: 0.0x1/2 + 0.0x1/2 = 0% + 0% Question4: Score 0/1 Cars typically have springs to support weight and shocks to minimise oscillation. If a car has no shocks, then the car will behave like it attached to the ground by an ideal spring. A 140 kg person gets into a 1,700 kg car and causes it to lower by 15 cm. The car then hits a series of potholes that set it into oscillation. What is the period of oscillation? Your response Correct response 0.77 Auto graded Grade: 0/1.0 S * Total grade: 0.0x1/1 = 0%