Answer:
Correct answer: m = 83.29 kg
Explanation:
According to Newton's second law, the movement of the chair is:
F - Ffr = m · a => F - k m g = m a => F = k m g + m a => m (k g + a) = F
If we take that g = 10 m/s² then we get
m = F / k g + a = 335 / 0.33 · 10 + 0.722 = 83.29 kg
God is with you!!!
