9.1 Investigating simple machines

What is the common factor among all simple machines like levers, ramps, and pulleys?

• They decrease the amount of force needed.

• They are complex in design.

• They reduce speed of movement.

• They work without using any force.

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What is the load force in a simple machine?

• The effort applied to the machine.

• The speed of movement.

• The object being moved.

• The friction between the surfaces.

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What is the mechanical advantage of a simple machine?

• The effort divided by the load force.

• The effort divided by the friction.

• The load force divided by the speed of movement.

• The speed of movement divided by the effort.

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In a class 1 lever, where is the fulcrum located?

• At one end.

• Between the load and effort.

• Between the load and fulcrum.

• It varies depending on the lever.

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What type of levers are classified as force multipliers?

• Class 1 and class 3 levers.

• Class 2 and class 3 levers.

• Class 1 and class 2 levers.

• None of the above.

What is the trade-off associated with using a ramp?

• Requires more effort and less distance.

• Requires less effort and less distance.

• Requires more effort and more distance.

• Requires less effort and more distance.

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What is a screw's function as a simple machine?

• To provide a flat surface.

• To multiply the force applied.

• To move loads vertically.

• To change the direction of force.

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What type of simple machine has two inclined planes and is used to split layered material?

• Lever

• Wedge

• Screw

• Ramp

When using a wedge with a long thin cross-section, what can be said about its mechanical advantage?

• It has a lower mechanical advantage.

• It has a higher mechanical advantage.

• It does not affect the mechanical advantage.

• It depends on the material being split.

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What is an example of a wedge in everyday life?

• Tennis racquet

• Doorstop

• Class 1 lever

• Pulley