Understanding Torque and Center of Gravity

The video tutorial covers concepts of circular motion and torque, explaining how torque is calculated and applied in practical scenarios. It discusses the center of mass and its role in equilibrium, using examples like seesaws and the solar system. The tutorial also explores the center of gravity in motion, such as when a wrench is thrown or a person bends over. Finally, it examines different types of equilibrium and stability, highlighting how objects maintain balance.

What is the main reason Susie, the spacewalker, appears to be at rest relative to the rotating space station?

• The space station is not in Earth's orbit.

• She is moving at the same speed as the space station.

• She is moving in the opposite direction of the space station.

• She is not moving at all.

Which of the following increases torque when using a wrench?

• Using a smaller wrench.

• Increasing the force applied.

• Applying force at an angle less than 90 degrees.

• Decreasing the lever arm length.

In the context of torque, what is the effect of exerting force perpendicular to the lever arm?

• It reduces the force required.

• It minimizes the torque produced.

• It maximizes the torque produced.

• It has no effect on the torque.

Why is a screwdriver with a wide handle more effective for turning screws?

• It provides a better grip.

• It allows for a longer lever arm.

• It is easier to store.

• It is lighter to hold.

How does the center of mass affect the motion of a spinning wrench?

• It causes the wrench to stop spinning.

• It makes the wrench spin in a circle.

• It follows a straight line path.

• It causes the wrench to spin faster.

How does the center of mass of a human body change when bending over?

• It moves towards the feet.

• It remains at the same point.

• It moves outside the body.

• It moves higher in the body.

What is the role of a spider monkey's tail in its balance?

• It allows the monkey to vary its center of gravity.

• It makes the monkey heavier.

• It is used for communication.

• It helps the monkey climb faster.

Why do people tend to hold their free arm away from their body when carrying a heavy load with one arm?

• To prevent the load from falling.

• To look more balanced.

• To make the load feel lighter.

• To change the center of gravity of their body.

What happens to the center of gravity when an object is in stable equilibrium and is displaced?

• It causes the object to topple over.

• It remains unchanged.

• It raises and the object returns to its original position.

• It lowers and the object remains stable.

What is the effect of a neutral equilibrium on an object's center of gravity?

• The center of gravity raises.

• The center of gravity lowers.

• The center of gravity remains unchanged.

• The object becomes unstable.