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What is torque?
The force that makes something turn or spin.
What is a gear?
A wheel with teeth that helps machines move.
If a system makes more torque, what usually happens to the speed?
It goes down
You turn a doorknob. What kind of force are you using?
Torque.
What is the definition of horsepower?
The measure of how fast something moves.
What is the main goal of reverse engineering a product?
To understand how something works so you can improve, redesign, or learn from it.
If a big gear turns a small gear, does the big gear spin faster or slower?
Slower
If the driving gear is bigger than the driven gear is there high or low torque.
Low Torque
A truck has high torque. What can it do better than a racecar?
It can move heavier things.
What is the new torque if the intial torque was 0.13 Newton Meters and the gear ratio is 5?
0.65 Nm
What two things do you multiply to find new torque?
Old torque and the gear ratio.
What do we call the comparison between two gears, like “2:1”?
Gear ratio
What is the new torque if the intial torque was 0.16 Newton Meters and the gear ratio is 8?
1.28 Newton Meters
A small gear turns a bigger gear. What happens to speed and torque?
Speed goes down, torque goes up.
If a motor creates 20 Nm of torque and it goes through a gear ratio of 6:1, what is the torque on the output gear?
120 Nm of torque
Which motor gives more torque: a big motor with a torque of 10 Nm or a small motor with 4 Nm of initial torque but it has a gear ratio of 7:3?
The Big Motor
What two things do you multiply to find intial torque?
Force applied x Distance from pivot.
Write two ways to represent the gear ratio if the new torque is 0.45 and the initial torque is 0.15. Your answer should be in the form of (_:_),(_:_).
(3:1)(6:2) etc.
What happens to the torque and horsepower of a system if both gears in the system are the same size?
They stay the same.
Which step comes after brainstorming a possible solution in the engineering process?
Build a Prototype
A wrench is 0.2 meters long. If you apply a force of 40 N at the end of the wrench, how much torque are you creating?
8 Nm of torque
If the driven gear has 3 teeth and the driving gear has 60 teeth, what is the gear ratio?
1/20, 1:20
Your robot has a motor that spins at 100 RPM with 12 Nm of torque. You want to decrease the torque to 3 Nm using gears. What kind of gear ratio would you need? Your answer should be in the form of (_:_)
1:4
What is the gear ratio if the driver gear has 10 teeth and the driven gear has 8 teeth.
4/5.
You need to loosen a tight bolt that requires 45 Nm of torque. If you apply 9 Nm of force, what is the shortest distance away from the bolt you need to be to loosen the bolt?
5 m away