Question

15. A 150 N sled is pulled up a 25° slope at a constant speed by a force of 130 N. What is the coefficient of kinetic friction between sled and slope? A) 0.49N B) 0.1125 N C) 0.546 N D) 0.195 N E) 0.288 N 16. A student weighing 100 N climbs a flight of stairs 3.0 m high in 4 s. What power is required to perform this task? A) 0.1 Hp B) 40 W C) 2.6 Hp D) 0.126 Hp E) 270 w 17. A spring of spring constant of 11900 N/m and compressed by 0.45 m accelerates a 5 kg mass down a frictionless incline from a height of 9 m. What is the speed of the mass at the bottom of the inclined plane? A) 14.994 m/s B) 59.5 m/s C) 107.1 m/s D) 25.66 m/s E) 34.272 m/s

Answer 1

Hence option (A) is correct.