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You and your two younger siblings are playing on a seesaw. Your little brother, whose mass is 25 kg, sits 2.5 meters to the left of the pivot point, and your little sister, whose mass is 35 kg, sits 1 meter to the left of the pivot point. Because you weigh 70 kg, where should you sit to make the seesaw balance

Respuesta :

Answer: 1.4 m

Explanation:

Given

Mass of siblings are 25kg and 35 kg who sits at 2.5 m and 1 m left to pivot.

Suppose the 70 kg mass sits at a distance x from the pivot towards right.

Torque applied by two siblings must cancel the torque of 70 kg mass i.e.

[tex]\Rightarrow 25\times 2.5+35\times1=70x\\\Rightarrow 62.5+35=70x\\\\\Rightarrow x=\dfrac{97.5}{70}\\\\\Rightarrow x=1.392\approx 1.4\ m[/tex]

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