Bennet Test Question

by Chris Ramirez

When using a wheel barrel on uneven ground, is it better to have a larger wheel in the front of the wheel barrel or a smaller wheel?

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starstarstar 		Mechanical Comprehension is common sense
by: Anonymous

Mechanical Comprehension tests common sense hense the word comprehension. It exposes how your mind comprehends mechanical and logical situations. I'd like to say to the first comment on this page titled 'Wheel Size'. It has nothing to do with the number of revolutions the wheel does because the revolutions does not determine the amount of work the person does. What does matter is the distance from the wheel's pivot point (shaft) and the contact between the ground and wheel. The bigger the distance the more leverage you have on the opposing forces of the ground. If the pivot point is higher than the terrain then things are a lot easier. You would more correct if we were talking about a bicycle because the person is driving the bike via the wheels pivot point, but in this case the wheel barrel is being pushed not driven.
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starstarstarstarstar 		Wheel size
by: Anonymous

The purpose of a simple machine like a lever, pully or in this case a wheel is to reduce the work load on the person doing the work. The smaller the wheel the less distance the wheelbarrel is going to travel on each revolution of the wheel. The larger wheel means the wheelbarrel is going to travel futher with each revolution of the wheel. So if the person moves at the same speed the less work will be done with the larger wheel. The only arternative for the small wheel is to move faster which means more work will still be done by the small wheel
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starstarstarstarstar 		My take on the wheelbarrow question
by: Anonymous

Blame it on me being a good ol' boy from rural southern Mississippi but this seemed like a common sense type question to me. If driving a 4X4 across uneven terrain would you want huge monster mudder tires or little wheels the size of a skateboard?

And in response to a Stallion or Osprey taking off from the moon, it's not that the fuel system is gravity fed and there is no gravity...the fuel is actual pumped under positive pressure and there is some amount gravity on the moon. The point is there is no atmosphere for the rotor blades to push against.

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