# inclined plane

## mechanical advantage of an inclined plane

The mechanical advantage of a simple machine is the factor by which it multiplies the force applied to the machine. It is the ratio of output force (the force put out by the machined) to input force (the force put into the machine). For an inclined plane, less force is put into moving an object up the slope than if the object were lifted straight up, so the mechanical advantage is greater than 1. The more gradual the slope of the inclined plane, the less input force is needed and the greater the mechanical advantage. Q: Which inclined plane pictured in the Figure 1.2 has a greater mechanical advantage? A: The inclined plane on the right has a more gradual slope, so it has a greater mechanical advantage. Less force is needed to move objects up the gentler slope, yet the objects attain the same elevation as they would if more force were used to push them up the steeper slope.

## what is an inclined plane

An inclined plane is a simple machine that consists of a sloping surface connecting a lower elevation to a higher elevation. An inclined plane is one of six types of simple machines, and it is one of the oldest and most basic. In fact, two other simple machines, the wedge and the screw, are variations of the inclined plane. A ramp like the one in the Figure 1.1 is another example of an inclined plane. Inclined planes make it easier to move objects to a higher elevation. The sloping surface of the inclined plane supports part of the weight of the object as it moves up the slope. As a result, it takes less force to move the object uphill. The trade-off is that the object must be moved over a greater distance than if it were moved straight up to the higher elevation.

## instructional diagrams

No diagram descriptions associated with this lesson

## questions

an inclined plane is one of six types of simple machines.

``````-->  a. true

b. false
``````

simple machines that are variations of the inclined plane include the

``````a) screw.

b) lever.

c) wedge.

-->  d) two of the above
``````

examples of inclined planes include

``````a) ramps.

b) playground slides.

-->  d) all of the above
``````

mechanical advantage is the ratio of input force to output force.

``````a. true

-->  b. false
``````

the mechanical advantage of an inclined plane is always

``````a) less than 1.

b) equal to 1.

-->  c) greater than 1.

d) equal to zero.
``````

the more gradual the slope of an inclined plane, the greater its mechanical advantage is.

``````-->  a. true

b. false
``````

## diagram questions

No diagram questions associated with this lesson