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A block of wood is at rest on a wooden ramp. When wheels are attached to the block of wood, it moves down the ramp. Explain each situation in terms of friction.

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The wood was at the wooden ramp so it was in static friction. This is much more then rolling friction. That's why the wood doesn't move. When we attach wheels to it, it converts it into rolling friction which is 100 times less then static friction and that's why the block of wood rolls down the ramp.
azikennamdi

In the absence of the wheels, the gravitational force pulling on the block of wood towards the bottom of the ramp is balanced or equated to the force of sliding friction, or the potential energy acquired by the block of wood.

As a result, there is no net force on the that can cause the block of good to slide down the ramp.

When wheels become attached to the block of wood, the force of the rolling friction becomes much lesser than the force of the sliding friction. This increases the gravitational pull on the block towards the bottom of the ramp. That is, potential energy is created and begins to seek dissipation.

The correction will continue unless acted upon by an external force until the net force is corrected.

What is Friction?

This refers to the resistance to motion of one object moving in relation to another. There is:

  • Static Friction
  • Sliding Friction
  • Rolling Friction and
  • Fluid Friction


Learn more about friction at included planes  in the link below:

https://brainly.com/question/13881699