2. A 5.0 kg mass is released from rest at the top of a frictionless 30 inclined a) 2K, 1C plane. b) 3T, 1C C) 4T, 1C a) Calculate the kinetic energy of the mass when it has slid 40 cm down the incline starting from rest. Fi = Es PEL + KEI = PES + KEg to vilbol ov of b) There is a spring at the bottom of the 30 frictionless incline. A 5.0 kg mass is released from rest at the top of the incline and slides down the incline and is momentarily stopped by the spring. The total distance, including the distance that the spring is compressed, that is travelled by the mass is 40 cm. The spring constant is 7840 N/m. Calculate the distance of the compression of the spring. EL = EF PE: + KEi = PES + KEf c) In a further experiment, a spring is at the bottom of a 30 rough incline. A 5.0 kg mass is released from rest at the top of the incline and slides down the incline and it is momentarily stopped by the spring (spring constant of 7840 N/m). The total distance, including the distance that the spring is compressed, that is travelled by the mass is 40 cm. The spring is compressed 3.0 cm when the mass is momentarily stopped. Calculate the coefficient of kinetic friction between the mass and the surface of the incline. F'd = DE not conservative fd = Ef - Er Answer = 0. 37 or something SPH4U Page 2