You Do 116 J of Work While Pulling Your Sister $5.10 \mathrm {~m}$

Multiple Choice

You do 116 J of work while pulling your sister back on a fritctionless swing, whose chain is $5.10 \mathrm {~m}$ long, until the swing makes an angle of 32.0° with the vertical. What is your sister's mass?

A) 15.3 kg
B) 13.0 kg
C) 17.6 kg
D) 19.0 kg