Respuesta :
Answer:112.7 N
Explanation: mass of chair = 11.5kg, g= acceleration due to gravity = 9.8m/s^2
F = applied force = 42.0 N
The normal reaction is always acting upwards which is given as
R = mg = 11.5 × 9.8 = 112.7 N
Answer: Normal force = 139N
Explanation:
Please find the attached file for the solution
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