Understanding Gears and Torque Concepts

What is torque?

• A linear force that causes an object to move in a straight line.

• A rotational force, equivalent to a linear force in rotational motion.

• The rate at which work is done.

• The frequency of force application.

How is horsepower defined in relation to torque?

• It is the inverse of torque.

• It is the rate of torque, or the frequency of torque application.

• It is the strength of rotation.

• It is unrelated to torque.

What is the main purpose of adding gears to the motor system?

• To increase the motor's size.

• To manipulate torque and speed.

• To reduce the motor's power output.

• To change the direction of rotation only.

What was the primary reason the small motor initially failed to move the heavy arm directly?

• The motor was too large for the arm.

• It generated insufficient torque.

• It had too much horsepower.

• The arm was not properly lubricated.

In a gear system, what is the "driver" gear?

• The gear that receives the force input and has work done on it.

• The gear that is connected to the heavy arm.

• The gear where the force input is, and that does the work.

• The largest gear in the system.

If a driver gear has 8 teeth and a driven gear has 40 teeth, what is the gear ratio?

• 0.2

• 5

• 32

• 48

What happens to the gear ratio if the driver gear has 24 teeth and the driven gear has 40 teeth?

• It increases to 5.

• It decreases to 1.67.

• It remains the same.

• It becomes 24.

If the small motor's initial torque is 0.03 Nm and it's connected to a gear system with a ratio of 5, what is the resulting output torque?

• 0.03 Nm

• 0.14 Nm

• 0.15 Nm

• 5 Nm

How do gears function in relation to levers?

• A gear acts as a fulcrum, changing the direction of force.

• A gear acts like a lever, increasing the leverage provided by the gear.

• A gear acts as a simple pulley system, distributing weight.

• A gear acts as a wedge, splitting the input force.

What is the consequence of increasing torque using gears?

• Increased efficiency.

• Decreased rotational speed.

• Increased power consumption.

• Reduced friction.