original velocity of the projectile described in the previous XII. The questions

Question

original velocity of the projectile described in the previous XII. The questions below refer to the T Di Mi M2 Mo Ms XII1. In the figure above, assume that the meter stick is in equilibrium. Write down the equations of the net torques: (a) Counterclockwise Net Torque T,et (CCW) = (b) Clockwise Net Torque Tnet (CW) XIL.2. Given the following values: Mo 85.0 g (meter stick) Mi 100. g M-200. g Do 10.0cm Di 35.0 cm D2 20.0 cm D 60.0 cm What is the value of the mass Ms necessary to establish equilibrium of the system? Express your result with 3 significant figures; show your calculations

Explanation / Answer

1
a)

T_net(CCW) = M1*D1 + M2*D2

b)
T_net(CC) = Mo*Do + M3*D3

2)

In the equiilibrium,

T_net(CCW) = T_net(CC)

M1*D1 + M2*D2 = Mo*Do + M3*D3

M3 = (M1*D1 + M2*D2 - Mo*Do)/D3

= (100*35 + 200*20 - 85*10)/60

= 111 grams

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