A 1 kg rock is suspended by a massless string from one end of a meter stick at the 0 cm mark....

Question:

A 1 kg rock is suspended by a massless string from one end of a meter stick at the 0 cm mark. What is the mass m suspended from the meter stick at the 75 cm mark if the system is balanced?

Torque:

Torque is exerted on an object when a force is exerted on an object at a distance from a rotation axis. If there are multiple torques on an object and they aren't balanced, the object will rotationally accelerate. If the torques are balanced the object is in rotational equilibrium.

Answer and Explanation:


The mass has to be 2 kg at the 75 cm mark.

The 1 kg mass's weight provides a counterclockwise torque and the unknown mass's weight provides a...

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What is Torque? - Definition, Equation & Calculation

from Holt McDougal Physics: Online Textbook Help

Chapter 4 / Lesson 11
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