Question

3. Five identical keys are suspended from a balance, which is held horizontally as shown. The two keys on the left
are attached to the balance 6 centimeters from the pivot.

What will happen when the person lets go of the balance beam? Explain.​

Answer 1

Explanation:

Let's say the mass of each key is m.

Sum the moments about the pivot.

∑τ = (2mg) (-0.06) + (3mg) (0.05)

∑τ = -0.12 mg + 0.15 mg

∑τ = 0.03 mg

Since the net torque is positive, the balance will rotate clockwise.

Answer 2

What will happen when the person lets go of the balance beam it will fall more to the right side as its torque to that side is greater.

What is torque?

Torque is a physical concept, related to the rotational movement of a body after the application of a certain force on it. Imagine that you are using a wrench to turn a screw. The force applied to the tool when the screw is unscrewed is the torque.

Let's say the mass of each key is m.

$\sum T_L= 12 \\\sum T_R=15$

See more about torque at brainly.com/question/6855614