Wheel and Axle

ericlepanda
Member
Member
Posts: 35
Joined: February 9th, 2016, 2:53 pm
Division: B
State: IL
Contact:

Wheel and Axle

Postby ericlepanda » February 9th, 2016, 2:57 pm

Will a wheel and axle rolling down a ramp on its axle, and then hitting a lever, count as a wheel and axle? Gravity is the input force on the axle, and the wheel has an output force on the lever.
Marie Murphy


Wright State\Regional\State\Nationals
Optics: 4th\2nd\2nd\6th
Food Science: 8th\1st\12th\14th
Hovercraft: 12th\1st\1st\2nd
Ecology 10th\3rd\5th\11th

chalker
Member
Member
Posts: 2065
Joined: January 9th, 2009, 7:30 pm
Division: Grad
State: OH
Contact:

Re: Wheel and Axle

Postby chalker » February 9th, 2016, 3:32 pm

ericlepanda wrote:Will a wheel and axle rolling down a ramp on its axle, and then hitting a lever, count as a wheel and axle? Gravity is the input force on the axle, and the wheel has an output force on the lever.


Here's a good rule of thumb in answering questions like this: would the device still work if the wheel was able to spin freely on the axle? If so, you aren't using the wheel and axle as a simple machine to gain mechanical advantage and it's not within the rules.

Student Alumni
National Event Supervisor
National Physical Sciences Rules Committee Chair

Uncle Fester
Member
Member
Posts: 149
Joined: May 14th, 2001, 4:59 pm
Division: Grad
State: IN
Location: Michigan, SO in Indiana
Contact:

Re: Wheel and Axle

Postby Uncle Fester » February 12th, 2016, 5:51 pm

Agreed. You're not using a wheel and axle; you happen to be using a friction-reducing device.

Dunno if you were planning on 'pointing' the ramp, but inclined plane WORK needs to go uphill.
Uncle Fester, Maker & Fiction Science Writer

The Misadventures of the Electric Detention
The Revenge of the Electric Detention
The Curse of the Electric Detention
>> Three full-length adventures, 26 short stories and counting!

Nair
Member
Member
Posts: 2
Joined: January 18th, 2016, 8:20 pm
State: -
Contact:

Re: Wheel and Axle

Postby Nair » March 2nd, 2016, 8:17 pm

Does this mean a wheel and axle need to work in place and not move along even a horizontal surface?

One of our wheel and axle work like this: A golf ball rolls down and hits the axle of the wheel. This pushes the wheel and axle forward on a horizontal surface.
Would it be considered a wheel and axle?

chalker
Member
Member
Posts: 2065
Joined: January 9th, 2009, 7:30 pm
Division: Grad
State: OH
Contact:

Re: Wheel and Axle

Postby chalker » March 3rd, 2016, 5:09 am

Nair wrote:Does this mean a wheel and axle need to work in place and not move along even a horizontal surface?

One of our wheel and axle work like this: A golf ball rolls down and hits the axle of the wheel. This pushes the wheel and axle forward on a horizontal surface.
Would it be considered a wheel and axle?


I'll point back to my general advice above "Here's a good rule of thumb in answering questions like this: would the device still work if the wheel was able to spin freely on the axle? If so, you aren't using the wheel and axle as a simple machine to gain mechanical advantage and it's not within the rules." and also recommend you read the Wikipedia page on Wheel and Axle: https://en.wikipedia.org/wiki/Wheel_and_axle

Student Alumni
National Event Supervisor
National Physical Sciences Rules Committee Chair


Return to “Mission Possible B”

Who is online

Users browsing this forum: No registered users and 1 guest