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A 3.00 x 105 kg subway train is brought to a stop from a speed of 1.57 miles per hour in 0.386 m by a large spring bumper at the end of its track. What is the force constant k of the spring? Please enter a numerical answer below. Accepted formats are numbers or "e" based scientific notation e.g. 0.23, -2, 146, 5.23e-8 Enter answer here CN/m
A spring that is hung from the ceiling stretches 0.422m when a 0.111kg mass is hung from it. The spring is taken down and laid horizontal on a frictionless table and attached by its free end to a rigid wall. With the same mass attached, the spring is then compressed by 0.785m from its rest length and released. Determine the maximum velocity of the mass in this horizontal configuration. Please enter a numerical answer below. Accepted formats are numbers or "e" based scientific notation e.g. 0.23,-2, 146, 5.23e-8 Enter answer here m/s