VEX IQ Robotics: Gears and Mechanics Quiz

What is the purpose of using gears in robotics?

• To increase the robot's weight

• To change the direction of rotation

• To adjust the speed and torque of motors

• To make the robot look more complex

If a gear train has a gear ratio of 5:1, what does it mean?

• The output gear is 5 times smaller than the input gear

• The output gear rotates 5 times faster than the input gear

• The output gear has 5 times more torque than the input gear

• The input gear rotates 5 times for every rotation of the output gear

What is mechanical advantage?

• The advantage of using mechanical systems in robots

• It compares the output force a mechanism or machine gives you to the input force that is applied to that mechanism or machine

  
  

• The increase in speed provided by a mechanical system

• The ability of a robot to perform tasks without human intervention

In classical mechanics - - -

• torque is measured in units of force times distance

• is Newton's Second Law of Motion

• speed and torque have an inverse (or opposite) relationship

• the unit is distance per time such as Km/hr or Meters per Second

What happens to the torque when you increase the gear ratio in a gear train?

• It decreases

• It increases

• It remains the same

• It becomes zero

What is the formula to calculate gear ratio?

• Output gear teeth / Input gear teeth

• Input gear teeth / Output gear teeth

• (Input gear teeth + Output gear teeth) / 2

• 2 * (Input gear teeth / Output gear teeth)

In a gear system, if the input gear has 10 teeth and the output gear has 40 teeth, what is the gear ratio? (Don't forget to reduce!)

• 1:4

• 4:1

• 10:40

• 40:10

What does increasing the speed of a gear system do to its torque?

• Increases the torque

• Decreases the torque

• Does not affect the torque

• Doubles the torque

Which principle of classical mechanics is primarily used to calculate the forces in a gear system?

• The principle of relativity

• The law of universal gravitation

• Newton's laws of motion

• The principle of conservation of energy

When you have a system with a Driving Gear that is ________ than the Driven Gear you will increase Speed and decrease Torque.

• smaller

• tighter

• older

• larger