The bi in bicycle actually means two, so by definition a vehicle with another number of wheels is something else. There are unicycles, trikes, pedal cars and HPVs(Human Powered Vehicles) .
There are two wheels on a bike.
Typically only one. This allows the load to roll without restricting its direction, or requiring pivots or steering axles.
2 on a ordany bike four with training wells or 3 on a trike
2
1
wheelbarrow
A wheelbarrow uses wheels.
Wheelbarrow is spelt exactly as you have spelt it. It is a "barrow" on "wheels": hence, "wheelbarrow".
It depends on the wheelbarrow
A wheelbarrow has 1 wheel for maneuverabilty. Although they do have bigger barrows that have two wheels. However, if they are too widely spaced, they need to be able to pivot.
the wheels go round and round up and down side to side very flexible easy to use
It depends on the size of the wheelbarrow.
You would need more force to push a wheelbarrow across a dirt road than a wood floor because of the friction created between the dirt road and the wheelbarrow wheels.
ask your local DIY store for 4 wheelbarrow wheels and tires. In the US it would be about $60 a set and in UK is £45.
How many shovel of sand in a wheelbarrows
a wheelbarrow
Somewhere between, 0,08 and 0,12 depending on your wheelbarrow.