Pulleys: Angular Velocity and Diameter

The video tutorial explains how to calculate the diameters of pulleys B, C, and D in a pulley system. Pulley A is given with a diameter of 20 inches and an angular velocity of 3000 RPM. The tutorial walks through the process of using the belt and pulley ratio to find the required diameters of pulleys B, C, and D when their respective angular velocities are 4000 RPM, 5000 RPM, and 7000 RPM. The calculations involve simplifying ratios and solving for the unknown diameters.

What is the initial angular velocity of pulley A?

• 4,000 RPM

• 3,000 RPM

• 2,000 RPM

• 5,000 RPM

What is the diameter of pulley A?

• 25 inches

• 20 inches

• 30 inches

• 15 inches

How many pulleys are attached to the single output axle?

• Two

• Three

• Four

• Five

What is the purpose of moving the drive belt between pulleys B, C, and D?

• To increase the number of pulleys

• To decrease the system's efficiency

• To change the color of the belt

• To adjust the speed and torque output

What is the required angular velocity for pulley B?

• 6,000 RPM

• 5,000 RPM

• 4,000 RPM

• 3,000 RPM

What is the formula used to find the diameter of pulley B?

• Diameter of B = (Angular velocity of B / Angular velocity of A) * Diameter of A

• Diameter of B = (Angular velocity of A / Angular velocity of B) * Diameter of A

• Diameter of B = (Diameter of A / Angular velocity of B) * Angular velocity of A

• Diameter of B = (Angular velocity of A * Angular velocity of B) / Diameter of A

What is the calculated diameter of pulley B?

• 12 inches

• 10 inches

• 15 inches

• 18 inches

What is the required angular velocity for pulley C?

• 5,000 RPM

• 6,000 RPM

• 7,000 RPM

• 4,000 RPM

What is the calculated diameter of pulley C?

• 16 inches

• 10 inches

• 14 inches

• 12 inches

What is the required angular velocity for pulley D?

• 7,000 RPM

• 6,000 RPM

• 5,000 RPM

• 8,000 RPM