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Homework

Total questions: 9

Worksheet time: 5mins

Name
Class
Date
1.
When speed increases, what happens to the value of torque?
a)
increases
b)
decreases
c)
stays constant
2.
A gear ratio is defined as which of the following?
a)
Teeth of gear : teeth of gear
b)
gear shape : gear shape
c)
Speed : torque
3.
When gears are equal in size, what happens to the speed and torque?
a)
Speed increases; torques decreases
b)
Speed decreases; torque increases
c)
Speed and torque are constant
4.
When gears are equal in size, what is the gear ratio?
a)
1:2
b)
1:3
c)
2:5
d)
1:1
5.

On your robots, if a large gear is attached to the motor and a smaller gear is attached to the wheel, what happens?

a)

The smaller gear turns faster than the large gear and the speed of the robot increases (and torque decreases).

b)

Both gears turn at the same speed.

c)

The smaller gear turns slower than the large gear and the speed of the robot decreases (and torque increases).

6.

On your robots, if a small gear is attached to the motor and a larger gear is attached to the wheel, what happens?

a)

The larger gear turns faster than the small gear and the speed of the robot increases (and torque decreases).

b)

Both gears turn at the same speed.

c)

The larger gear turns slower than the small gear and the speed of the robot decreases (and torque increases).

7.

The driven gear is the gear attached to the wheel of your EV3

a)

True

b)

False

8.

The driving gear is the gear attached to the EV3 motor

a)

True

b)

False

9.

Besides gears, another item that can affect the speed of the robot is...

a)

The axle length

b)

Direction of the motor

c)

Number of sensors

d)

Diameter of the wheels