WorksheetsGears
Total questions: 15
Worksheet time: 12mins
Q. The drive gear on your solar car is turned by the _____________.
Driven Gear
Idler Gear
Motor
Solar Panel
Q. True or False: Gears next to each other turn in the same direction.
True
False
Q. The purpose of the IDLER GEAR is to ____________.
change the speed of rotation
add more gears for fun
make the model harder to build
change the direction of rotation
Q. To INCREASE speed of rotation, you can ____________________.
add more gears
change from a LARGE gear to a SMALL gear
turn the handle less times
change from a SMALL gear to a LARGE gear
Q. Gears are normally _______________.
smooth
round
grey
small
Q. The purpose of a gear train is to ___________________
join gears together
create patterns
Q. Why are there cogs / teeth on a gear?
to slow it down
to make it go faster
to grip / mesh with other gears
for decoration
How do you make a gear train?
arrange gears on a railroad track
join 3 or more gears together
Q. Why do gears exist?
to change the speed or direction of a force
to hold things together
What is torque?
Speed
a gear train
gear ratio
Rotational force
Q. When gears are the same size they turn the same number of times.
True
False
Q. The bigger gear in the image turns more times than the smaller gear.
True
False
How can the gear ratio calculated?
Number of Teeth on Drive Gear / Number of Teeth on the Driven Gear
Number of Teeth on Drive Gear X Number of Teeth on the Driven Gear
Number of Teeth on Driven Gear / Number of Teeth on the Drive Gear
Number of Teeth on Driven Gear X Number of Teeth on the Drive Gear
If the drive gear has 24 teeth and the driven gear has 12 teeth, what is the gear ratio?
1 : 2
24 : 12
2 : 1
12 : 24
What does a gear ratio of 3 : 1 mean?
The drive gear is larger than the driven gear
The drive gear is smaller than the driven gear
