In a Carnival Ride,passengers Stand with Their Backs Against the Wall

question 62

Multiple Choice

In a carnival ride,passengers stand with their backs against the wall of a cylinder.The cylinder is set into rotation and the floor is lowered away from the passengers,but they remain stuck against the wall of the cylinder.For a cylinder with a 2.0-m radius,what is the minimum speed that the passengers can have so they do not fall if the coefficient of static friction between the passengers and the wall is 0.25?

• A)8.9 m/s
• B)2.3 m/s
• C)3.0 m/s
• D)4.9 m/s
• E)It depends on the mass of the passengers.

---

Definitions:

Pulmonary Semilunar Valve

A valve in the heart located between the right ventricle and the pulmonary artery that prevents backflow of blood into the heart during ventricular relaxation.

Aortic Semilunar Valve

A valve in the heart situated between the left ventricle and the aorta that prevents blood from flowing back into the heart.

Pericardium

The pericardium is the fibrous sac that encloses the heart, providing it protection and the lubrication needed for its movements.

Lubrication

The process or technique of using a lubricant to reduce friction and wear between two surfaces in contact.