Billy Cart Wheels and Axles
The AXLE
b. Medium_________mm
c. Large___________mm
4. How long is the centre bore?
a. Small ___________mm
b. Medium_________mm
c. Large___________mm
5. There will be a 25mm spacer on the insideof the wheel and 20mm is needed outside the wheel for a washer and split pin. Use this information to sketch the axle with wheels, spacers, washers and split pins attached.
6. How long does the axle need to be?___________
7. If the length of the steel rod is 6m, how many axles can be cut from each rod?__________
THE WHEEL
b.
c.
d.
The AXLE
- How wide is the chassis? ______________mm
- Why do we measure in mm?
- Measure the width of each wheel
b. Medium_________mm
c. Large___________mm
4. How long is the centre bore?
a. Small ___________mm
b. Medium_________mm
c. Large___________mm
5. There will be a 25mm spacer on the insideof the wheel and 20mm is needed outside the wheel for a washer and split pin. Use this information to sketch the axle with wheels, spacers, washers and split pins attached.
6. How long does the axle need to be?___________
7. If the length of the steel rod is 6m, how many axles can be cut from each rod?__________
THE WHEEL
- What safety information is contained on the wheel?
b.
c.
d.
2. Measure the diameter of each wheel to find its circumference.
Remember circumference = pi x diameter
Remember circumference = pi x diameter
small |
medium |
large |
________________ |
______________ |
_______________ |
3. Measure around each tyre to check your accuracy. Record each measurement in the table below then calculate your percentage error.
WHEELS |
small |
medium |
large |
Calculated circumference |
____________ |
____________ |
____________ |
Measured circumference |
____________ |
____________ |
____________ |
Difference (error) |
____________ |
____________ |
____________ |
Percentage error = error/measurement x 100% |
____________ |
____________ |
____________ |
4. If the billy cart travels 100m, how many revolutions will each wheel have to make to cover the distance?
5. Explain which wheels you would use on a billy cart, giving reasons for your choice.