Gears, sprockets and pulley drives

LITTLE gears are used for

• More turning power (torque)
• More rotational speed

Tags

NGSS.MS-PS3-1

NGSS.MS-PS3-5

BIG gears are used for

• More turning power (torque)
• More rotational speed

Tags

NGSS.MS-ETS1-1

How many times does the little gear has to turn in a gear train with a big gear of 72 teeth and a little gear of 12?

• 6 times 
• 4 times
• 3 times
• I don't know

Tags

NGSS.MS-PS2-1

NGSS.MS-PS2-2

When a drive gear is larger than a driven gear the output is.....

• More Speed
• More Torque
• Less Speed
• Change in angle

When a drive gear is smaller than the driven gear the result is....

• More Speed
• More Torque
• Less Torque
• More Angle

Tags

NGSS.MS-PS2-1

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

Tags

NGSS.MS-PS2-2

IF 2 GEARS ARE CONNECTED WHICH WAY DO THEY TURN

• SAME DIRECTION
• OPPOSITE DIRECTION 

Which of the following can NOT be changed with gears?

• Speed
• Pressure
• Torque
• Direction

If the driving gear has 10 teeth and moves with a speed of 15 RPM, how fast is the driven gear moving if it has 30 teeth?

• 1 RPM
• 45 RPM
• 5 RPM
• 10 RPM

In order for two gears to mesh, they need to have the same size (and shape) teeth on the same spacing, known as what?

• Gear ratio

• Gear aptitude

• Gear pitch

• Gear crest