Sid is swinging back and forth on a swing. The time that it takes to go all the way forward and back again is four seconds. Sid gets off the swing, and Nancy gets on who's mass is 10kg lighter. The current height that that Nancy is swinging to is 2m. Nancy's friend Jonny shows up and wants to help. He starts pushing Nancy from behind as she starts to move forward, away from Jonny. What happens to the height that Nancy is swinging to? A. It decreases B. It increases C. No answer text provided D. It stays the same What happens to the frequency at which Nancy is swinging if Johnny is pushing as in the last question? A. It stays the same B. No answer text provided. C. It increases D. It decreases