Question

To determine the location of his center of mass, a physics student lies on a lightweight plank supported by two scales L 2.32 m apart, as indicated in the figure below. Axis d rctation 0 If the left scale reads 290 N, and the right scale reads 140 N, calculate the student's mass. Submit Answer Tries 0/8 Calculate the distance from the student's head to his center of mass Tries 0/8 Submit Answer Send Feedback Post Discussion

Answer 1

Here,

let the mass of students is m

m* g = total force

m * 9.8 = 290 + 140

m = 43.9 kg

the mass of the student is 43.9 Kg

let the distance of center of mass is x

mg * x - 140 * L = 0

43.9 * 9.8 * x - 140 * 2.32 = 0

L = 0.75 m

the distance from the student's head is 0.75 m