Torque and Speed Calculations

This video tutorial covers solutions for calculating torque on gears and determining angular speeds in a gear train and pulley system. It begins with torque calculations for gears A and B, using force and radius. Next, it explains how to find the angular speed of gear E by applying gear ratios. Finally, it demonstrates calculating the angular speed of pulley B using diameter ratios in a belt drive system.

What is the first step in calculating the torque on a gear?

• Convert the force from pounds to newtons

• Determine the number of teeth on the gear

• Convert the radius from inches to feet

• Calculate the angular speed

If a force of 20 pounds is applied to a gear with a radius of 0.75 feet, what is the torque?

• 15 foot-pounds

• 20 foot-pounds

• 10 foot-pounds

• 5 foot-pounds

In a gear train, how is the speed of a driven gear calculated?

• By multiplying the speed of the driver gear by the gear ratio

• By adding the speeds of all gears

• By dividing the speed of the driver gear by the number of teeth

• By subtracting the speed of the driver gear from the driven gear

What is the angular speed of gear E if gear A rotates at 120 RPM and the gear ratio is calculated as 72/12 * 12/60 * 24/48?

• 100 RPM

• 60 RPM

• 90 RPM

• 72 RPM

How do you determine the driven speed of a pulley in a belt system?

• By using the diameter ratio of the driver and driven pulleys

• By calculating the torque on the pulley

• By counting the number of belts

• By measuring the length of the belt

If the initial driver speed is 200 RPM and the diameter ratio is 20/12, what is the next step in finding the speed of the driven pulley?

• Multiply by the next diameter ratio

• Divide by the number of belts

• Multiply by the number of belts

• Add the initial speed to the diameter ratio

What is the final speed of pulley B if the initial speed is 200 RPM and the diameter ratios are 20/12, 8/16, and 8/4?

• 400 RPM

• 333 RPM

• 250 RPM

• 300 RPM