Suppose the student in (Figure 1) is 64 kg, and the board being stood on has a 1
ID: 1285832 • Letter: S
Question
Suppose the student in (Figure 1) is 64 kg, and the board being stood on has a 14 kg mass.
What is the reading on the left scale? Express your answer using two significant figures.
What is the reading on the right scale? Express your answer using two significant figures.
Suppose the student in (Figure 1) is 64 kg, and the board being stood on has a 14 kg mass. What is the reading on the left scale? Express your answer using two significant figures. What is the reading on the right scale? Express your answer using two significant figures.Explanation / Answer
in the equilibrium,
Fnety = 0
FL + FR - 14*9.8 - 64*9.8 = 0
FL + FR = (64+14)*9.8
FL + FR = 764.4 N --(2)
in the equilibrium net torque about any point = 0
so, torque about left end = 0
1*14*9.8 + 1.5*64*9.8 -FR*2 = 0
==> FR = (1*14*9.8 + 1.5*64*9.8)/2
= 539 N <<<<<<<<<<-------Answer
from equation 2
FL = 764.4 - FR
= 764.4 - 539
= 225.4 N <<<<<<<<<<-------Answer