Practice Problem: Torque on a Mobile

The video tutorial guides viewers through building a solar system mobile, focusing on balancing the mobile using the concept of torque. It explains how to calculate the necessary weights for each planet to achieve balance, starting with known values and using the principle of torque. The tutorial concludes with converting these weights into masses, ensuring the mobile is correctly balanced.

What is the primary concept needed to balance the solar system mobile?

• Inertia

• Gravity

• Torque

• Friction

How does sitting further from the fulcrum on a seesaw affect your ability to lift someone heavier?

• It has no effect.

• It makes it harder to lift them.

• It depends on the seesaw's material.

• It makes it easier to lift them.

If Mercury has a weight of 5 newtons, what must be the weight of Venus to balance the arm?

• 20 newtons

• 15 newtons

• 5 newtons

• 10 newtons

What is the weight of Uranus in the mobile system?

• 25 newtons

• 20 newtons

• 15 newtons

• 10 newtons

How do you calculate the mass of the planets from their weights?

• Multiply by the acceleration due to gravity

• Divide by the acceleration due to gravity

• Add the acceleration due to gravity

• Subtract the acceleration due to gravity