K = 100.0 m 2.50 kg Students build an oscillator by hanging an object from an ideal vertical spring. The object has a label that indicates its mass is 2.50 kg. The spring is to have a spring constant of 100.0 . The students use these values to calculate the period of oscillation to be 0.993. The students set the oscillator into motion and use a motion sensor to determine experimentally that it takes 4.62 seconds for the object to complete five oscillations. Which of the following is a reasonable explanation for the discrepancy between the calculated and experimental periods? A The calculated value of the period is incorrect. B The mass of the object is actually larger than its labeled value. C There is an error in the use of the motion sensor. D There is friction related to the motion of the spring. (E The spring constant is actually larger than its design value