Which simple machine is the sloping board used to push a crate onto a truck?

Ignoring friction, how does moving a box up a loading ramp compare with lifting it straight up to the same height?

Paolo raises one end of a board without changing its length. Ignoring friction, what happens to the force needed to pull the same toy car steadily uphill?

Use the slope length and height shown. What is this ramp's ideal mechanical advantage?

Ignoring friction, what effort pulls a 90 N load steadily up the pictured ramp?

Which force makes water flow down a sloping bathtub floor toward the drain?

Which description explains the spiral shape of a wood fastener?

Which simple machine lets this bottle cap tighten when it is turned?

What are the raised spiral ridges around a wood fastener called?

Which term names the distance from one spiral ridge to the next on a wood fastener?

Which part of a wood screw converts its turning motion into forward movement through the wood?

A metal fastener is being tightened into wood. Which motion shows it working properly?

Two otherwise identical wood fasteners have different ridge spacing. Ignoring friction, which needs less turning force for the same forward push?

A wastewater plant uses a rotating spiral device in a tilted trough. What job can this device do?

Bea models a screw whose single spiral thread has ridges 2 mm apart. How far would the screw advance during three complete turns?

Which shape is typical of a tool used to split wood?

Which simple machine does the cutting edge of this kitchen tool act as?

A worker drives a wedge downward into a log. In which direction do its sloping sides exert forces that separate the wood?

Two needles have equally wide shafts but different point lengths. Ignoring friction, which needs less force to push cloth fibers aside?

Which pair of simple machines is formed by changing the shape of a sloping surface?